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dragonwell8_jdk
提交 21067e9b 编写于 作者: B briangoetz
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8024637: Lambda linkage performance - use reflection instead of ASM to manipulate parameter types 

8023984: Lambda linkage performance - use a method ref to a static factory instead of a ctor ref
Reviewed-by: briangoetz, rfield
Contributed-by: sergey.kuksenko@oracle.com
上级 52dbf4b5
隐藏空白更改
内联 并排
Showing with 140 addition and 88 deletion
src/share/classes/java/lang/invoke/InnerClassLambdaMetafactory.java
浏览文件 @ 21067e9b
......@@ -26,6 +26,7 @@
package java.lang.invoke;
import jdk.internal.org.objectweb.asm.*;
import sun.invoke.util.BytecodeDescriptor;
import sun.misc.Unsafe;
import sun.security.action.GetPropertyAction;
......@@ -54,6 +55,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
private static final String METHOD_DESCRIPTOR_VOID = Type.getMethodDescriptor(Type.VOID_TYPE);
private static final String JAVA_LANG_OBJECT = "java/lang/Object";
private static final String NAME_CTOR = "<init>";
private static final String NAME_FACTORY = "get$Lambda";
//Serialization support
private static final String NAME_SERIALIZED_LAMBDA = "java/lang/invoke/SerializedLambda";
......@@ -76,6 +78,8 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
private static final String[] SER_HOSTILE_EXCEPTIONS = new String[] {NAME_NOT_SERIALIZABLE_EXCEPTION};
private static final String[] EMPTY_STRING_ARRAY = new String[0];
// Used to ensure that each spun class name is unique
private static final AtomicInteger counter = new AtomicInteger(0);
......@@ -94,15 +98,12 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
private final String implMethodClassName; // Name of type containing implementation "CC"
private final String implMethodName; // Name of implementation method "impl"
private final String implMethodDesc; // Type descriptor for implementation methods "(I)Ljava/lang/String;"
private final Type[] implMethodArgumentTypes; // ASM types for implementation method parameters
private final Type implMethodReturnType; // ASM type for implementation method return type "Ljava/lang/String;"
private final Class<?> implMethodReturnClass; // class for implementaion method return type "Ljava/lang/String;"
private final MethodType constructorType; // Generated class constructor type "(CC)void"
private final String constructorDesc; // Type descriptor for constructor "(LCC;)V"
private final ClassWriter cw; // ASM class writer
private final Type[] argTypes; // ASM types for the constructor arguments
private final String[] argNames; // Generated names for the constructor arguments
private final String[] argDescs; // Type descriptors for the constructor arguments
private final String lambdaClassName; // Generated name for the generated class "X$$Lambda$1"
private final Type[] instantiatedArgumentTypes; // ASM types for the functional interface arguments
/**
* General meta-factory constructor, supporting both standard cases and
......@@ -157,22 +158,23 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
implMethodClassName = implDefiningClass.getName().replace('.', '/');
implMethodName = implInfo.getName();
implMethodDesc = implMethodType.toMethodDescriptorString();
Type implMethodAsmType = Type.getMethodType(implMethodDesc);
implMethodArgumentTypes = implMethodAsmType.getArgumentTypes();
implMethodReturnType = (implKind == MethodHandleInfo.REF_newInvokeSpecial)
? Type.getObjectType(implMethodClassName)
: implMethodAsmType.getReturnType();
implMethodReturnClass = (implKind == MethodHandleInfo.REF_newInvokeSpecial)
? implDefiningClass
: implMethodType.returnType();
constructorType = invokedType.changeReturnType(Void.TYPE);
constructorDesc = constructorType.toMethodDescriptorString();
lambdaClassName = targetClass.getName().replace('.', '/') + "$$Lambda$" + counter.incrementAndGet();
cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
argTypes = Type.getArgumentTypes(constructorDesc);
argNames = new String[argTypes.length];
for (int i = 0; i < argTypes.length; i++) {
argNames[i] = "arg$" + (i + 1);
int parameterCount = invokedType.parameterCount();
if (parameterCount > 0) {
argNames = new String[parameterCount];
argDescs = new String[parameterCount];
for (int i = 0; i < parameterCount; i++) {
argNames[i] = "arg$" + (i + 1);
argDescs[i] = BytecodeDescriptor.unparse(invokedType.parameterType(i));
}
} else {
argNames = argDescs = EMPTY_STRING_ARRAY;
}
instantiatedArgumentTypes = Type.getArgumentTypes(
instantiatedMethodType.toMethodDescriptorString());
}
/**
......@@ -222,8 +224,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
try {
return new ConstantCallSite(
MethodHandles.Lookup.IMPL_LOOKUP
.findConstructor(innerClass, constructorType)
.asType(constructorType.changeReturnType(samBase)));
.findStatic(innerClass, NAME_FACTORY, invokedType));
}
catch (ReflectiveOperationException e) {
throw new LambdaConversionException("Exception finding constructor", e);
......@@ -268,29 +269,31 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
JAVA_LANG_OBJECT, interfaces);
// Generate final fields to be filled in by constructor
for (int i = 0; i < argTypes.length; i++) {
for (int i = 0; i < argDescs.length; i++) {
FieldVisitor fv = cw.visitField(ACC_PRIVATE + ACC_FINAL,
argNames[i],
argTypes[i].getDescriptor(),
argDescs[i],
null, null);
fv.visitEnd();
}
generateConstructor();
if (invokedType.parameterCount() != 0) {
generateFactory();
}
// Forward the SAM method
String methodDescriptor = samMethodType.toMethodDescriptorString();
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, samMethodName,
methodDescriptor, null, null);
new ForwardingMethodGenerator(mv).generate(methodDescriptor);
samMethodType.toMethodDescriptorString(), null, null);
new ForwardingMethodGenerator(mv).generate(samMethodType);
// Forward the bridges
if (additionalBridges != null) {
for (MethodType mt : additionalBridges) {
methodDescriptor = mt.toMethodDescriptorString();
mv = cw.visitMethod(ACC_PUBLIC|ACC_BRIDGE, samMethodName,
methodDescriptor, null, null);
new ForwardingMethodGenerator(mv).generate(methodDescriptor);
mt.toMethodDescriptorString(), null, null);
new ForwardingMethodGenerator(mv).generate(mt);
}
}
......@@ -322,24 +325,44 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
return UNSAFE.defineAnonymousClass(targetClass, classBytes, null);
}
/**
* Generate the factory method for the class
*/
private void generateFactory() {
MethodVisitor m = cw.visitMethod(ACC_PRIVATE | ACC_STATIC, NAME_FACTORY, invokedType.toMethodDescriptorString(), null, null);
m.visitCode();
m.visitTypeInsn(NEW, lambdaClassName);
m.visitInsn(Opcodes.DUP);
int parameterCount = invokedType.parameterCount();
for (int typeIndex = 0, varIndex = 0; typeIndex < parameterCount; typeIndex++) {
Class<?> argType = invokedType.parameterType(typeIndex);
m.visitVarInsn(getLoadOpcode(argType), varIndex);
varIndex += getParameterSize(argType);
}
m.visitMethodInsn(INVOKESPECIAL, lambdaClassName, NAME_CTOR, constructorType.toMethodDescriptorString());
m.visitInsn(ARETURN);
m.visitMaxs(-1, -1);
m.visitEnd();
}
/**
* Generate the constructor for the class
*/
private void generateConstructor() {
// Generate constructor
MethodVisitor ctor = cw.visitMethod(ACC_PRIVATE, NAME_CTOR,
constructorDesc, null, null);
constructorType.toMethodDescriptorString(), null, null);
ctor.visitCode();
ctor.visitVarInsn(ALOAD, 0);
ctor.visitMethodInsn(INVOKESPECIAL, JAVA_LANG_OBJECT, NAME_CTOR,
METHOD_DESCRIPTOR_VOID);
int lvIndex = 0;
for (int i = 0; i < argTypes.length; i++) {
int parameterCount = invokedType.parameterCount();
for (int i = 0, lvIndex = 0; i < parameterCount; i++) {
ctor.visitVarInsn(ALOAD, 0);
ctor.visitVarInsn(argTypes[i].getOpcode(ILOAD), lvIndex + 1);
lvIndex += argTypes[i].getSize();
ctor.visitFieldInsn(PUTFIELD, lambdaClassName, argNames[i],
argTypes[i].getDescriptor());
Class<?> argType = invokedType.parameterType(i);
ctor.visitVarInsn(getLoadOpcode(argType), lvIndex + 1);
lvIndex += getParameterSize(argType);
ctor.visitFieldInsn(PUTFIELD, lambdaClassName, argNames[i], argDescs[i]);
}
ctor.visitInsn(RETURN);
// Maxs computed by ClassWriter.COMPUTE_MAXS, these arguments ignored
......@@ -369,16 +392,14 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
mv.visitLdcInsn(implInfo.getName());
mv.visitLdcInsn(implInfo.getMethodType().toMethodDescriptorString());
mv.visitLdcInsn(instantiatedMethodType.toMethodDescriptorString());
mv.iconst(argTypes.length);
mv.iconst(argDescs.length);
mv.visitTypeInsn(ANEWARRAY, JAVA_LANG_OBJECT);
for (int i = 0; i < argTypes.length; i++) {
for (int i = 0; i < argDescs.length; i++) {
mv.visitInsn(DUP);
mv.iconst(i);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, lambdaClassName, argNames[i],
argTypes[i].getDescriptor());
mv.boxIfTypePrimitive(argTypes[i]);
mv.visitFieldInsn(GETFIELD, lambdaClassName, argNames[i], argDescs[i]);
mv.boxIfTypePrimitive(Type.getType(argDescs[i]));
mv.visitInsn(AASTORE);
}
mv.visitMethodInsn(INVOKESPECIAL, NAME_SERIALIZED_LAMBDA, NAME_CTOR,
......@@ -430,20 +451,19 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
super(mv);
}
void generate(String methodDescriptor) {
void generate(MethodType methodType) {
visitCode();
if (implKind == MethodHandleInfo.REF_newInvokeSpecial) {
visitTypeInsn(NEW, implMethodClassName);
visitInsn(DUP);
}
for (int i = 0; i < argTypes.length; i++) {
for (int i = 0; i < argNames.length; i++) {
visitVarInsn(ALOAD, 0);
visitFieldInsn(GETFIELD, lambdaClassName, argNames[i],
argTypes[i].getDescriptor());
visitFieldInsn(GETFIELD, lambdaClassName, argNames[i], argDescs[i]);
}
convertArgumentTypes(Type.getArgumentTypes(methodDescriptor));
convertArgumentTypes(methodType);
// Invoke the method we want to forward to
visitMethodInsn(invocationOpcode(), implMethodClassName, implMethodName, implMethodDesc);
......@@ -451,46 +471,36 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
// Convert the return value (if any) and return it
// Note: if adapting from non-void to void, the 'return'
// instruction will pop the unneeded result
Type samReturnType = Type.getReturnType(methodDescriptor);
convertType(implMethodReturnType, samReturnType, samReturnType);
visitInsn(samReturnType.getOpcode(Opcodes.IRETURN));
Class<?> samReturnClass = methodType.returnType();
convertType(implMethodReturnClass, samReturnClass, samReturnClass);
visitInsn(getReturnOpcode(samReturnClass));
// Maxs computed by ClassWriter.COMPUTE_MAXS,these arguments ignored
visitMaxs(-1, -1);
visitEnd();
}
private void convertArgumentTypes(Type[] samArgumentTypes) {
private void convertArgumentTypes(MethodType samType) {
int lvIndex = 0;
boolean samIncludesReceiver = implIsInstanceMethod &&
argTypes.length == 0;
invokedType.parameterCount() == 0;
int samReceiverLength = samIncludesReceiver ? 1 : 0;
if (samIncludesReceiver) {
// push receiver
Type rcvrType = samArgumentTypes[0];
Type instantiatedRcvrType = instantiatedArgumentTypes[0];
visitVarInsn(rcvrType.getOpcode(ILOAD), lvIndex + 1);
lvIndex += rcvrType.getSize();
convertType(rcvrType, Type.getType(implDefiningClass), instantiatedRcvrType);
Class<?> rcvrType = samType.parameterType(0);
visitVarInsn(getLoadOpcode(rcvrType), lvIndex + 1);
lvIndex += getParameterSize(rcvrType);
convertType(rcvrType, implDefiningClass, instantiatedMethodType.parameterType(0));
}
int argOffset = implMethodArgumentTypes.length - samArgumentTypes.length;
for (int i = samReceiverLength; i < samArgumentTypes.length; i++) {
Type argType = samArgumentTypes[i];
Type targetType = implMethodArgumentTypes[argOffset + i];
Type instantiatedArgType = instantiatedArgumentTypes[i];
visitVarInsn(argType.getOpcode(ILOAD), lvIndex + 1);
lvIndex += argType.getSize();
convertType(argType, targetType, instantiatedArgType);
int samParametersLength = samType.parameterCount();
int argOffset = implMethodType.parameterCount() - samParametersLength;
for (int i = samReceiverLength; i < samParametersLength; i++) {
Class<?> argType = samType.parameterType(i);
visitVarInsn(getLoadOpcode(argType), lvIndex + 1);
lvIndex += getParameterSize(argType);
convertType(argType, implMethodType.parameterType(argOffset + i), instantiatedMethodType.parameterType(i));
}
}
private void convertType(Type argType, Type targetType, Type functionalType) {
convertType(argType.getDescriptor(),
targetType.getDescriptor(),
functionalType.getDescriptor());
}
private int invocationOpcode() throws InternalError {
switch (implKind) {
case MethodHandleInfo.REF_invokeStatic:
......@@ -508,4 +518,43 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
}
}
}
static int getParameterSize(Class<?> c) {
if (c == Void.TYPE) {
return 0;
} else if (c == Long.TYPE || c == Double.TYPE) {
return 2;
}
return 1;
}
static int getLoadOpcode(Class<?> c) {
if(c == Void.TYPE) {
throw new InternalError("Unexpected void type of load opcode");
}
return ILOAD + getOpcodeOffset(c);
}
static int getReturnOpcode(Class<?> c) {
if(c == Void.TYPE) {
return RETURN;
}
return IRETURN + getOpcodeOffset(c);
}
private static int getOpcodeOffset(Class<?> c) {
if (c.isPrimitive()) {
if (c == Long.TYPE) {
return 1;
} else if (c == Float.TYPE) {
return 2;
} else if (c == Double.TYPE) {
return 3;
}
return 0;
} else {
return 4;
}
}
}
src/share/classes/java/lang/invoke/TypeConvertingMethodAdapter.java
浏览文件 @ 21067e9b
......@@ -28,6 +28,7 @@ package java.lang.invoke;
import jdk.internal.org.objectweb.asm.MethodVisitor;
import jdk.internal.org.objectweb.asm.Opcodes;
import jdk.internal.org.objectweb.asm.Type;
import sun.invoke.util.BytecodeDescriptor;
import sun.invoke.util.Wrapper;
import static sun.invoke.util.Wrapper.*;
......@@ -204,27 +205,27 @@ class TypeConvertingMethodAdapter extends MethodVisitor {
}
/**
* Convert an argument of type 'argType' to be passed to 'targetType' assuring that it is 'functionalType'.
* Convert an argument of type 'arg' to be passed to 'target' assuring that it is 'functional'.
* Insert the needed conversion instructions in the method code.
* @param argType
* @param targetType
* @param functionalType
* @param arg
* @param target
* @param functional
*/
void convertType(String dArg, String dTarget, String dFunctional) {
if (dArg.equals(dTarget)) {
void convertType(Class<?> arg, Class<?> target, Class<?> functional) {
if (arg.equals(target)) {
return;
}
Wrapper wArg = toWrapper(dArg);
Wrapper wTarget = toWrapper(dTarget);
if (wArg == VOID || wTarget == VOID) {
if (arg == Void.TYPE || target == Void.TYPE) {
return;
}
if (isPrimitive(wArg)) {
if (isPrimitive(wTarget)) {
if (arg.isPrimitive()) {
Wrapper wArg = Wrapper.forPrimitiveType(arg);
if (target.isPrimitive()) {
// Both primitives: widening
widen(wArg, wTarget);
widen(wArg, Wrapper.forPrimitiveType(target));
} else {
// Primitive argument to reference target
String dTarget = BytecodeDescriptor.unparse(target);
Wrapper wPrimTarget = wrapperOrNullFromDescriptor(dTarget);
if (wPrimTarget != null) {
// The target is a boxed primitive type, widen to get there before boxing
......@@ -237,16 +238,18 @@ class TypeConvertingMethodAdapter extends MethodVisitor {
}
}
} else {
String dArg = BytecodeDescriptor.unparse(arg);
String dSrc;
Wrapper wFunctional = toWrapper(dFunctional);
if (isPrimitive(wFunctional)) {
if (functional.isPrimitive()) {
dSrc = dArg;
} else {
// Cast to convert to possibly more specific type, and generate CCE for invalid arg
dSrc = dFunctional;
cast(dArg, dFunctional);
dSrc = BytecodeDescriptor.unparse(functional);
cast(dArg, dSrc);
}
if (isPrimitive(wTarget)) {
String dTarget = BytecodeDescriptor.unparse(target);
if (target.isPrimitive()) {
Wrapper wTarget = toWrapper(dTarget);
// Reference argument to primitive target
Wrapper wps = wrapperOrNullFromDescriptor(dSrc);
if (wps != null) {
......
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