242 lines
12 KiB
Smali
242 lines
12 KiB
Smali
# Copyright 2016 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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.class LMain;
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.super Ljava/lang/Object;
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# MethodHandle Main.getHandleForVirtual(Class<?> defc, String name, MethodType type);
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#
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# Returns a handle to a virtual method on |defc| named name with type |type| using
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# the public lookup object.
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.method public static getHandleForVirtual(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/MethodHandle;
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.registers 5
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# Get a reference to the public lookup object (MethodHandles.publicLookup()).
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invoke-static {}, Ljava/lang/invoke/MethodHandles;->publicLookup()Ljava/lang/invoke/MethodHandles$Lookup;
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move-result-object v0
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# Call Lookup.findVirtual(defc, name, type);
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invoke-virtual {v0, p0, p1, p2}, Ljava/lang/invoke/MethodHandles$Lookup;->findVirtual(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/MethodHandle;
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move-result-object v1
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return-object v1
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.end method
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# MethodHandle Main.getHandleForStatic(Class<?> defc, String name, MethodType type);
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#
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# Returns a handle to a static method on |defc| named name with type |type| using
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# the public lookup object.
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.method public static getHandleForStatic(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/MethodHandle;
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.registers 5
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# Get a reference to the public lookup object (MethodHandles.publicLookup()).
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invoke-static {}, Ljava/lang/invoke/MethodHandles;->publicLookup()Ljava/lang/invoke/MethodHandles$Lookup;
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move-result-object v0
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# Call Lookup.findStatic(defc, name, type);
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invoke-virtual {v0, p0, p1, p2}, Ljava/lang/invoke/MethodHandles$Lookup;->findStatic(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/MethodHandle;
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move-result-object v1
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return-object v1
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.end method
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# Returns a method handle to String java.lang.String.concat(String);
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.method public static getStringConcatHandle()Ljava/lang/invoke/MethodHandle;
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.registers 3
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const-string v0, "concat"
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invoke-virtual {v0}, Ljava/lang/Object;->getClass()Ljava/lang/Class;
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move-result-object v1
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# Call MethodType.methodType(rtype=String.class, ptype[0] = String.class)
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invoke-static {v1, v1}, Ljava/lang/invoke/MethodType;->methodType(Ljava/lang/Class;Ljava/lang/Class;)Ljava/lang/invoke/MethodType;
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move-result-object v2
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# Call Main.getHandleForVirtual(String.class, "concat", methodType);
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invoke-static {v1, v0, v2}, LMain;->getHandleForVirtual(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/MethodHandle;
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move-result-object v0
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return-object v0
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.end method
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# Returns a method handle to boolean java.lang.Long.compareTo(java.lang.Long other).
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.method public static getLongCompareToHandle()Ljava/lang/invoke/MethodHandle;
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.registers 4
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new-instance v0, Ljava/lang/Long;
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const-wide v1, 0
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invoke-direct {v0, v1, v2}, Ljava/lang/Long;-><init>(J)V
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invoke-virtual {v0}, Ljava/lang/Object;->getClass()Ljava/lang/Class;
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move-result-object v0
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# set v0 to Integer.TYPE aka. int.class
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sget-object v1, Ljava/lang/Integer;->TYPE:Ljava/lang/Class;
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# Call MethodType.methodType(rtype=int.class, ptype[0] = Long.class)
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invoke-static {v1, v0}, Ljava/lang/invoke/MethodType;->methodType(Ljava/lang/Class;Ljava/lang/Class;)Ljava/lang/invoke/MethodType;
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move-result-object v2
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const-string v3, "compareTo"
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# Call Main.getHandleForVirtual(Long.class, "compareTo", methodType);
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invoke-static {v0, v3, v2}, LMain;->getHandleForVirtual(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/MethodHandle;
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move-result-object v0
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return-object v0
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.end method
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# Returns a method handle to static String java.lang.String.valueOf(Object);
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.method public static getStringValueOfObjectHandle()Ljava/lang/invoke/MethodHandle;
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.registers 4
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# set v0 to java.lang.Object.class
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new-instance v0, Ljava/lang/Object;
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invoke-direct {v0}, Ljava/lang/Object;-><init>()V
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invoke-virtual {v0}, Ljava/lang/Object;->getClass()Ljava/lang/Class;
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move-result-object v0
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# set v1 to the name of the method ("valueOf") and v2 to java.lang.String.class;
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const-string v1, "valueOf"
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invoke-virtual {v1}, Ljava/lang/Object;->getClass()Ljava/lang/Class;
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move-result-object v2
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# Call MethodType.methodType(rtype=String.class, ptype[0]=Object.class)
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invoke-static {v2, v0}, Ljava/lang/invoke/MethodType;->methodType(Ljava/lang/Class;Ljava/lang/Class;)Ljava/lang/invoke/MethodType;
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move-result-object v3
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# Call Main.getHandleForStatic(String.class, "valueOf", methodType);
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invoke-static {v2, v1, v3}, LMain;->getHandleForStatic(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/MethodHandle;
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move-result-object v0
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return-object v0
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.end method
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# Returns a method handle to static String java.lang.String.valueOf(String);
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.method public static getStringValueOfLongHandle()Ljava/lang/invoke/MethodHandle;
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.registers 4
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# set v0 to Long.TYPE aka. long.class
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sget-object v0, Ljava/lang/Long;->TYPE:Ljava/lang/Class;
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# set v1 to the name of the method ("valueOf") and v2 to java.lang.String.class;
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const-string v1, "valueOf"
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invoke-virtual {v1}, Ljava/lang/Object;->getClass()Ljava/lang/Class;
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move-result-object v2
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# Call MethodType.methodType(rtype=String.class, ptype[0]=Long.class)
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invoke-static {v2, v0}, Ljava/lang/invoke/MethodType;->methodType(Ljava/lang/Class;Ljava/lang/Class;)Ljava/lang/invoke/MethodType;
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move-result-object v3
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# Call Main.getHandleForStatic(String.class, "valueOf", methodType);
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invoke-static {v2, v1, v3}, LMain;->getHandleForStatic(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/MethodHandle;
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move-result-object v0
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return-object v0
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.end method
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.method public static main([Ljava/lang/String;)V
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.registers 5
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# Test case 1: Exercise String.concat(String, String) which is a virtual method.
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invoke-static {}, LMain;->getStringConcatHandle()Ljava/lang/invoke/MethodHandle;
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move-result-object v0
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const-string v1, "[String1]"
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const-string v2, "+[String2]"
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invoke-polymorphic {v0, v1, v2}, Ljava/lang/invoke/MethodHandle;->invokeExact([Ljava/lang/Object;)Ljava/lang/Object;, (Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
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move-result-object v3
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sget-object v4, Ljava/lang/System;->out:Ljava/io/PrintStream;
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invoke-virtual {v4, v3}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V
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# Test case 2: Exercise String.valueOf(Object);
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invoke-static {}, LMain;->getStringValueOfObjectHandle()Ljava/lang/invoke/MethodHandle;
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move-result-object v0
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const-string v1, "[String1]"
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invoke-polymorphic {v0, v1}, Ljava/lang/invoke/MethodHandle;->invokeExact([Ljava/lang/Object;)Ljava/lang/Object;, (Ljava/lang/Object;)Ljava/lang/String;
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move-result-object v3
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sget-object v4, Ljava/lang/System;->out:Ljava/io/PrintStream;
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invoke-virtual {v4, v3}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V
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# Test case 3: Exercise String.concat(String, String) with an inexact invoke.
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# Note that the callsite type here is String type(Object, Object); so the runtime
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# will generate dynamic type checks for the input arguments.
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invoke-static {}, LMain;->getStringConcatHandle()Ljava/lang/invoke/MethodHandle;
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move-result-object v0
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const-string v1, "[String1]"
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const-string v2, "+[String2]"
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invoke-polymorphic {v0, v1, v2}, Ljava/lang/invoke/MethodHandle;->invoke([Ljava/lang/Object;)Ljava/lang/Object;, (Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/String;
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move-result-object v3
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sget-object v4, Ljava/lang/System;->out:Ljava/io/PrintStream;
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invoke-virtual {v4, v3}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V
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# Test case 4: Exercise String.valueOf(long);
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#
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# We exercise it with various types of unboxing / widening conversions
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invoke-static {}, LMain;->getStringValueOfLongHandle()Ljava/lang/invoke/MethodHandle;
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move-result-object v0
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# First use a long, this is an invokeExact because the callsite type matches
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# the function type precisely.
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const-wide v1, 42
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invoke-polymorphic {v0, v1, v2}, Ljava/lang/invoke/MethodHandle;->invokeExact([Ljava/lang/Object;)Ljava/lang/Object;, (J)Ljava/lang/String;
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move-result-object v3
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sget-object v4, Ljava/lang/System;->out:Ljava/io/PrintStream;
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invoke-virtual {v4, v3}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V
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# Then use an int, should perform a widening conversion.
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const v1, 40
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invoke-polymorphic {v0, v1}, Ljava/lang/invoke/MethodHandle;->invoke([Ljava/lang/Object;)Ljava/lang/Object;, (I)Ljava/lang/String;
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move-result-object v3
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sget-object v4, Ljava/lang/System;->out:Ljava/io/PrintStream;
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invoke-virtual {v4, v3}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V
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# Then use a java/lang/Long; - should perform an unboxing conversion.
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new-instance v1, Ljava/lang/Long;
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const-wide v2, 43
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invoke-direct {v1, v2, v3}, Ljava/lang/Long;-><init>(J)V
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invoke-polymorphic {v0, v1}, Ljava/lang/invoke/MethodHandle;->invoke([Ljava/lang/Object;)Ljava/lang/Object;, (Ljava/lang/Long;)Ljava/lang/String;
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move-result-object v3
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sget-object v4, Ljava/lang/System;->out:Ljava/io/PrintStream;
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invoke-virtual {v4, v3}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V
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# Then use a java/lang/Integer; - should perform an unboxing in addition to a widening conversion.
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new-instance v1, Ljava/lang/Integer;
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const v2, 44
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invoke-direct {v1, v2}, Ljava/lang/Integer;-><init>(I)V
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invoke-polymorphic {v0, v1}, Ljava/lang/invoke/MethodHandle;->invoke([Ljava/lang/Object;)Ljava/lang/Object;, (Ljava/lang/Integer;)Ljava/lang/String;
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move-result-object v3
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sget-object v4, Ljava/lang/System;->out:Ljava/io/PrintStream;
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invoke-virtual {v4, v3}, Ljava/io/PrintStream;->println(Ljava/lang/String;)V
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# Test case 5: Exercise int Long.compareTo(Long)
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invoke-static {}, LMain;->getLongCompareToHandle()Ljava/lang/invoke/MethodHandle;
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move-result-object v0
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new-instance v1, Ljava/lang/Long;
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const-wide v2, 43
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invoke-direct {v1, v2, v3}, Ljava/lang/Long;-><init>(J)V
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# At this point, v0 is our MethodHandle and v1 is the instance we're going to call compareTo on.
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# Call compareTo(Long) - this is invokeExact semantics.
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invoke-polymorphic {v0, v1, v1}, Ljava/lang/invoke/MethodHandle;->invoke([Ljava/lang/Object;)Ljava/lang/Object;, (Ljava/lang/Long;Ljava/lang/Long;)I
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move-result v3
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sget-object v4, Ljava/lang/System;->out:Ljava/io/PrintStream;
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invoke-virtual {v4, v3}, Ljava/io/PrintStream;->println(I)V
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# Call compareTo(long) - this is an implicit box.
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const-wide v2, 44
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invoke-polymorphic {v0, v1, v2, v3}, Ljava/lang/invoke/MethodHandle;->invoke([Ljava/lang/Object;)Ljava/lang/Object;, (Ljava/lang/Long;J)I
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move-result v3
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sget-object v4, Ljava/lang/System;->out:Ljava/io/PrintStream;
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invoke-virtual {v4, v3}, Ljava/io/PrintStream;->println(I)V
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# Call compareTo(int) - this is an implicit box.
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# This throws WrongMethodTypeException as it's a two step conversion int->long->Long or int->Integer->Long.
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# const v2, 40
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# invoke-polymorphic {v0, v1, v2}, Ljava/lang/invoke/MethodHandle;->invoke([Ljava/lang/Object;)Ljava/lang/Object;, (Ljava/lang/Long;I)I
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# move-result v3
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# sget-object v4, Ljava/lang/System;->out:Ljava/io/PrintStream;
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# invoke-virtual {v4, v3}, Ljava/io/PrintStream;->print(I)V
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return-void
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.end method
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