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8144186: Update Main.asm sample to use dynalink public API

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Reviewed-by: hannesw, mhaupt
This commit is contained in:
Athijegannathan Sundararajan 2015-11-27 18:28:16 +05:30
parent 67506cb74c
commit 67d3d94345
2 changed files with 96 additions and 34 deletions
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130
nashorn/samples/Main.asm
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@ -38,66 +38,128 @@
//
// See also: https://wiki.openjdk.java.net/display/CodeTools/asmtools
//
// NOTE: Uses nashorn internals and so *may* break with later nashorn!
// NOTE: Uses dynalink API defined by JEP-276 (http://openjdk.java.net/jeps/276)
super public class Main
version 52:0
{
private static final Field linker:"Ljdk/dynalink/DynamicLinker;";
/*
static {
// create dynalink linker factory
final DynamicLinkerFactory factory = new DynamicLinkerFactory();
// create standard linker that can handle Java POJOs
linker = factory.createLinker();
}
*/
static Method "<clinit>":"()V"
stack 2 locals 1
{
new class jdk/dynalink/DynamicLinkerFactory;
dup;
invokespecial Method jdk/dynalink/DynamicLinkerFactory."<init>":"()V";
astore_0;
aload_0;
invokevirtual Method jdk/dynalink/DynamicLinkerFactory.createLinker:"()Ljdk/dynalink/DynamicLinker;";
putstatic Field linker:"Ljdk/dynalink/DynamicLinker;";
return;
}
/*
// Bootstrap method used with invokedynamic methods
public static CallSite bootstrap(MethodHandles.Lookup caller, String name, MethodType type) {
// use dynalink linker to perform the actual linking
return linker.link(
new SimpleRelinkableCallSite(
new CallSiteDescriptor(
MethodHandles.publicLookup(),
new NamedOperation(StandardOperation.GET_PROPERTY, name), type)
)
);
}
*/
public static Method bootstrap:"(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;"
stack 10 locals 3
{
getstatic Field linker:"Ljdk/dynalink/DynamicLinker;";
new class jdk/dynalink/support/SimpleRelinkableCallSite;
dup;
new class jdk/dynalink/CallSiteDescriptor;
dup;
invokestatic Method java/lang/invoke/MethodHandles.publicLookup:"()Ljava/lang/invoke/MethodHandles$Lookup;";
new class jdk/dynalink/NamedOperation;
dup;
getstatic Field jdk/dynalink/StandardOperation.GET_PROPERTY:"Ljdk/dynalink/StandardOperation;";
aload_1;
invokespecial Method jdk/dynalink/NamedOperation."<init>":"(Ljdk/dynalink/Operation;Ljava/lang/Object;)V";
aload_2;
invokespecial Method jdk/dynalink/CallSiteDescriptor."<init>":"(Ljava/lang/invoke/MethodHandles$Lookup;Ljdk/dynalink/Operation;Ljava/lang/invoke/MethodType;)V";
invokespecial Method jdk/dynalink/support/SimpleRelinkableCallSite."<init>":"(Ljdk/dynalink/CallSiteDescriptor;)V";
invokevirtual Method jdk/dynalink/DynamicLinker.link:"(Ljdk/dynalink/RelinkableCallSite;)Ljdk/dynalink/RelinkableCallSite;";
checkcast class java/lang/invoke/CallSite;
areturn;
}
// default constructor that does nothing!
public Method "<init>":"()V"
stack 1 locals 1
{
aload_0;
invokespecial Method java/lang/Object."<init>":"()V";
return;
aload_0;
invokespecial Method java/lang/Object."<init>":"()V";
return;
}
public static Method main:"([Ljava/lang/String;)V"
stack 2 locals 2
{
// List l = new ArrayList();
new class java/util/ArrayList;
dup;
invokespecial Method java/util/ArrayList."<init>":"()V";
astore_1;
aload_1;
// List l = new ArrayList();
new class java/util/ArrayList;
dup;
invokespecial Method java/util/ArrayList."<init>":"()V";
astore_1;
aload_1;
// l.add("hello");
ldc String "hello";
invokeinterface InterfaceMethod java/util/List.add:"(Ljava/lang/Object;)Z", 2;
pop;
// l.add("hello");
ldc String "hello";
invokeinterface InterfaceMethod java/util/List.add:"(Ljava/lang/Object;)Z", 2;
pop;
// l.add("world");
aload_1;
ldc String "world";
invokeinterface InterfaceMethod java/util/List.add:"(Ljava/lang/Object;)Z", 2;
pop;
// l.add("world");
aload_1;
ldc String "world";
invokeinterface InterfaceMethod java/util/List.add:"(Ljava/lang/Object;)Z", 2;
pop;
// printLength(l);
aload_1;
invokestatic Method printLength:"(Ljava/lang/Object;)V";
// printLength(l);
aload_1;
invokestatic Method printLength:"(Ljava/lang/Object;)V";
// printLength(args); // args is argument of main method
aload_0;
invokestatic Method printLength:"(Ljava/lang/Object;)V";
return;
// printLength(args); // args is argument of main method
aload_0;
invokestatic Method printLength:"(Ljava/lang/Object;)V";
return;
}
private static Method printLength:"(Ljava/lang/Object;)V"
stack 2 locals 1
{
getstatic Field java/lang/System.out:"Ljava/io/PrintStream;";
aload_0;
getstatic Field java/lang/System.out:"Ljava/io/PrintStream;";
aload_0;
// Using nashorn embedded dynalink linker with the following invokedynamic
// 'length' property on a bean - arrays, lists supported
// Using bootstrap method in this class with the following invokedynamic
// which uses dynalink linker. Dynalink's bean linker handles Java beans.
// 'length' property on a bean - arrays, lists supported
invokedynamic InvokeDynamic REF_invokeStatic:jdk/nashorn/internal/runtime/linker/Bootstrap.bootstrap:"(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;I)Ljava/lang/invoke/CallSite;":"dyn:getProp|getElem|getMethod:length":"(Ljava/lang/Object;)Ljava/lang/Object;" int 0;
invokedynamic InvokeDynamic REF_invokeStatic:Main.bootstrap:"(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;":"length":"(Ljava/lang/Object;)Ljava/lang/Object;";
// print 'length' value
invokevirtual Method java/io/PrintStream.println:"(Ljava/lang/Object;)V";
return;
// print 'length' value
invokevirtual Method java/io/PrintStream.println:"(Ljava/lang/Object;)V";
return;
}
} // end Class Main

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nashorn/samples/Main.class
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