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8184777: Factor out species generation logic from BoundMethodHandle

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Co-authored-by: John Rose <john.r.rose@oracle.com>
Reviewed-by: vlivanov
This commit is contained in:
Claes Redestad 2017-11-16 00:58:50 +01:00
parent cc59ccb7d4
commit 433bf8ab65
13 changed files with 1550 additions and 655 deletions
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787
src/java.base/share/classes/java/lang/invoke/BoundMethodHandle.java
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@ -25,25 +25,21 @@
package java.lang.invoke;
import jdk.internal.loader.BootLoader;
import jdk.internal.org.objectweb.asm.ClassWriter;
import jdk.internal.org.objectweb.asm.FieldVisitor;
import jdk.internal.org.objectweb.asm.MethodVisitor;
import jdk.internal.vm.annotation.Stable;
import sun.invoke.util.ValueConversions;
import sun.invoke.util.Wrapper;
import java.lang.invoke.LambdaForm.NamedFunction;
import java.lang.invoke.MethodHandles.Lookup;
import java.lang.reflect.Field;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.function.Function;
import java.util.ArrayList;
import java.util.List;
import static java.lang.invoke.LambdaForm.BasicType;
import static java.lang.invoke.LambdaForm.BasicType.*;
import static java.lang.invoke.MethodHandleStatics.*;
import static jdk.internal.org.objectweb.asm.Opcodes.*;
import static java.lang.invoke.LambdaForm.BasicType.V_TYPE_NUM;
import static java.lang.invoke.LambdaForm.BasicType.V_TYPE_NUM;
import static java.lang.invoke.LambdaForm.BasicType.V_TYPE_NUM;
import static java.lang.invoke.MethodHandles.Lookup.IMPL_LOOKUP;
import static java.lang.invoke.MethodHandleNatives.Constants.*;
import static java.lang.invoke.MethodHandleStatics.newInternalError;
import static java.lang.invoke.MethodHandleStatics.uncaughtException;
/**
* The flavor of method handle which emulates an invoke instruction
@ -56,7 +52,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
/*non-public*/ BoundMethodHandle(MethodType type, LambdaForm form) {
super(type, form);
assert(speciesData() == speciesData(form));
assert(speciesData() == speciesDataFor(form));
}
//
@ -70,13 +66,13 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
case L_TYPE:
return bindSingle(type, form, x); // Use known fast path.
case I_TYPE:
return (BoundMethodHandle) SpeciesData.EMPTY.extendWith(I_TYPE).constructor().invokeBasic(type, form, ValueConversions.widenSubword(x));
return (BoundMethodHandle) SPECIALIZER.topSpecies().extendWith(I_TYPE_NUM).factory().invokeBasic(type, form, ValueConversions.widenSubword(x));
case J_TYPE:
return (BoundMethodHandle) SpeciesData.EMPTY.extendWith(J_TYPE).constructor().invokeBasic(type, form, (long) x);
return (BoundMethodHandle) SPECIALIZER.topSpecies().extendWith(J_TYPE_NUM).factory().invokeBasic(type, form, (long) x);
case F_TYPE:
return (BoundMethodHandle) SpeciesData.EMPTY.extendWith(F_TYPE).constructor().invokeBasic(type, form, (float) x);
return (BoundMethodHandle) SPECIALIZER.topSpecies().extendWith(F_TYPE_NUM).factory().invokeBasic(type, form, (float) x);
case D_TYPE:
return (BoundMethodHandle) SpeciesData.EMPTY.extendWith(D_TYPE).constructor().invokeBasic(type, form, (double) x);
return (BoundMethodHandle) SPECIALIZER.topSpecies().extendWith(D_TYPE_NUM).factory().invokeBasic(type, form, (double) x);
default : throw newInternalError("unexpected xtype: " + xtype);
}
} catch (Throwable t) {
@ -98,6 +94,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
BoundMethodHandle bindArgumentL(int pos, Object value) {
return editor().bindArgumentL(this, pos, value);
}
/*non-public*/
BoundMethodHandle bindArgumentI(int pos, int value) {
return editor().bindArgumentI(this, pos, value);
@ -114,7 +111,6 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
BoundMethodHandle bindArgumentD(int pos, double value) {
return editor().bindArgumentD(this, pos, value);
}
@Override
BoundMethodHandle rebind() {
if (!tooComplex()) {
@ -137,28 +133,29 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
static BoundMethodHandle makeReinvoker(MethodHandle target) {
LambdaForm form = DelegatingMethodHandle.makeReinvokerForm(
target, MethodTypeForm.LF_REBIND,
Species_L.SPECIES_DATA, Species_L.SPECIES_DATA.getterFunction(0));
Species_L.BMH_SPECIES, Species_L.BMH_SPECIES.getterFunction(0));
return Species_L.make(target.type(), form, target);
}
/**
* Return the {@link SpeciesData} instance representing this BMH species. All subclasses must provide a
* Return the {@link BoundMethodHandle.SpeciesData} instance representing this BMH species. All subclasses must provide a
* static field containing this value, and they must accordingly implement this method.
*/
/*non-public*/ abstract SpeciesData speciesData();
/*non-public*/ abstract BoundMethodHandle.SpeciesData speciesData();
/*non-public*/ static SpeciesData speciesData(LambdaForm form) {
/*non-public*/ static BoundMethodHandle.SpeciesData speciesDataFor(LambdaForm form) {
Object c = form.names[0].constraint;
if (c instanceof SpeciesData)
if (c instanceof SpeciesData) {
return (SpeciesData) c;
}
// if there is no BMH constraint, then use the null constraint
return SpeciesData.EMPTY;
return SPECIALIZER.topSpecies();
}
/**
* Return the number of fields in this BMH. Equivalent to speciesData().fieldCount().
*/
/*non-public*/ abstract int fieldCount();
/*non-public*/ final int fieldCount() { return speciesData().fieldCount(); }
@Override
Object internalProperties() {
@ -167,7 +164,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
@Override
final String internalValues() {
int count = speciesData().fieldCount();
int count = fieldCount();
if (count == 1) {
return "[" + arg(0) + "]";
}
@ -180,17 +177,18 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
/*non-public*/ final Object arg(int i) {
try {
switch (speciesData().fieldType(i)) {
case L_TYPE: return speciesData().getters[i].invokeBasic(this);
case I_TYPE: return (int) speciesData().getters[i].invokeBasic(this);
case J_TYPE: return (long) speciesData().getters[i].invokeBasic(this);
case F_TYPE: return (float) speciesData().getters[i].invokeBasic(this);
case D_TYPE: return (double) speciesData().getters[i].invokeBasic(this);
Class<?> fieldType = speciesData().fieldTypes().get(i);
switch (BasicType.basicType(fieldType)) {
case L_TYPE: return speciesData().getter(i).invokeBasic(this);
case I_TYPE: return (int) speciesData().getter(i).invokeBasic(this);
case J_TYPE: return (long) speciesData().getter(i).invokeBasic(this);
case F_TYPE: return (float) speciesData().getter(i).invokeBasic(this);
case D_TYPE: return (double) speciesData().getter(i).invokeBasic(this);
}
} catch (Throwable ex) {
throw uncaughtException(ex);
}
throw new InternalError("unexpected type: " + speciesData().typeChars+"."+i);
throw new InternalError("unexpected type: " + speciesData().key()+"."+i);
}
//
@ -210,20 +208,21 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
private // make it private to force users to access the enclosing class first
static final class Species_L extends BoundMethodHandle {
final Object argL0;
private Species_L(MethodType mt, LambdaForm lf, Object argL0) {
super(mt, lf);
this.argL0 = argL0;
}
@Override
/*non-public*/ SpeciesData speciesData() {
return SPECIES_DATA;
return BMH_SPECIES;
}
@Override
/*non-public*/ int fieldCount() {
return 1;
}
/*non-public*/ static final SpeciesData SPECIES_DATA = new SpeciesData("L", Species_L.class);
/*non-public*/ static @Stable SpeciesData BMH_SPECIES;
/*non-public*/ static BoundMethodHandle make(MethodType mt, LambdaForm lf, Object argL0) {
return new Species_L(mt, lf, argL0);
}
@ -234,7 +233,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
@Override
/*non-public*/ final BoundMethodHandle copyWithExtendL(MethodType mt, LambdaForm lf, Object narg) {
try {
return (BoundMethodHandle) SPECIES_DATA.extendWith(L_TYPE).constructor().invokeBasic(mt, lf, argL0, narg);
return (BoundMethodHandle) BMH_SPECIES.extendWith(L_TYPE_NUM).factory().invokeBasic(mt, lf, argL0, narg);
} catch (Throwable ex) {
throw uncaughtException(ex);
}
@ -242,7 +241,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
@Override
/*non-public*/ final BoundMethodHandle copyWithExtendI(MethodType mt, LambdaForm lf, int narg) {
try {
return (BoundMethodHandle) SPECIES_DATA.extendWith(I_TYPE).constructor().invokeBasic(mt, lf, argL0, narg);
return (BoundMethodHandle) BMH_SPECIES.extendWith(I_TYPE_NUM).factory().invokeBasic(mt, lf, argL0, narg);
} catch (Throwable ex) {
throw uncaughtException(ex);
}
@ -250,7 +249,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
@Override
/*non-public*/ final BoundMethodHandle copyWithExtendJ(MethodType mt, LambdaForm lf, long narg) {
try {
return (BoundMethodHandle) SPECIES_DATA.extendWith(J_TYPE).constructor().invokeBasic(mt, lf, argL0, narg);
return (BoundMethodHandle) BMH_SPECIES.extendWith(J_TYPE_NUM).factory().invokeBasic(mt, lf, argL0, narg);
} catch (Throwable ex) {
throw uncaughtException(ex);
}
@ -258,7 +257,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
@Override
/*non-public*/ final BoundMethodHandle copyWithExtendF(MethodType mt, LambdaForm lf, float narg) {
try {
return (BoundMethodHandle) SPECIES_DATA.extendWith(F_TYPE).constructor().invokeBasic(mt, lf, argL0, narg);
return (BoundMethodHandle) BMH_SPECIES.extendWith(F_TYPE_NUM).factory().invokeBasic(mt, lf, argL0, narg);
} catch (Throwable ex) {
throw uncaughtException(ex);
}
@ -266,7 +265,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
@Override
/*non-public*/ final BoundMethodHandle copyWithExtendD(MethodType mt, LambdaForm lf, double narg) {
try {
return (BoundMethodHandle) SPECIES_DATA.extendWith(D_TYPE).constructor().invokeBasic(mt, lf, argL0, narg);
return (BoundMethodHandle) BMH_SPECIES.extendWith(D_TYPE_NUM).factory().invokeBasic(mt, lf, argL0, narg);
} catch (Throwable ex) {
throw uncaughtException(ex);
}
@ -277,601 +276,177 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
// BMH species meta-data
//
/**
* Meta-data wrapper for concrete BMH types.
* Each BMH type corresponds to a given sequence of basic field types (LIJFD).
* The fields are immutable; their values are fully specified at object construction.
* Each BMH type supplies an array of getter functions which may be used in lambda forms.
* A BMH is constructed by cloning a shorter BMH and adding one or more new field values.
* The shortest possible BMH has zero fields; its class is SimpleMethodHandle.
* BMH species are not interrelated by subtyping, even though it would appear that
* a shorter BMH could serve as a supertype of a longer one which extends it.
*/
static class SpeciesData {
private final String typeChars;
private final BasicType[] typeCodes;
private final Class<? extends BoundMethodHandle> clazz;
// Bootstrapping requires circular relations MH -> BMH -> SpeciesData -> MH
// Therefore, we need a non-final link in the chain. Use array elements.
@Stable private final MethodHandle[] constructor;
@Stable private final MethodHandle[] getters;
@Stable private final NamedFunction[] nominalGetters;
@Stable private final SpeciesData[] extensions;
/*non-public*/
static final class SpeciesData extends ClassSpecializer<BoundMethodHandle, String, SpeciesData>.SpeciesData {
// This array is filled in lazily, as new species come into being over time.
@Stable final private SpeciesData[] extensions = new SpeciesData[ARG_TYPE_LIMIT];
/*non-public*/ int fieldCount() {
return typeCodes.length;
}
/*non-public*/ BasicType fieldType(int i) {
return typeCodes[i];
}
/*non-public*/ char fieldTypeChar(int i) {
return typeChars.charAt(i);
}
String fieldSignature() {
return typeChars;
}
public Class<? extends BoundMethodHandle> fieldHolder() {
return clazz;
}
public String toString() {
return "SpeciesData<"+fieldSignature()+">";
public SpeciesData(Specializer outer, String key) {
outer.super(key);
}
/**
* Return a {@link LambdaForm.Name} containing a {@link LambdaForm.NamedFunction} that
* represents a MH bound to a generic invoker, which in turn forwards to the corresponding
* getter.
*/
NamedFunction getterFunction(int i) {
NamedFunction nf = nominalGetters[i];
assert(nf.memberDeclaringClassOrNull() == fieldHolder());
assert(nf.returnType() == fieldType(i));
return nf;
@Override
protected String deriveClassName() {
String typeString = deriveTypeString();
if (typeString.isEmpty()) {
return SimpleMethodHandle.class.getName();
}
return BoundMethodHandle.class.getName() + "$Species_" + typeString;
}
NamedFunction[] getterFunctions() {
return nominalGetters;
@Override
protected List<Class<?>> deriveFieldTypes(String key) {
ArrayList<Class<?>> types = new ArrayList<>(key.length());
for (int i = 0; i < key.length(); i++) {
types.add(basicType(key.charAt(i)).basicTypeClass());
}
return types;
}
MethodHandle[] getterHandles() { return getters; }
MethodHandle constructor() {
return constructor[0];
@Override
protected String deriveTypeString() {
// (If/when we have to add nominal types, just inherit the more complex default.)
return key();
}
static final SpeciesData EMPTY = new SpeciesData("", BoundMethodHandle.class);
SpeciesData(String types, Class<? extends BoundMethodHandle> clazz) {
this.typeChars = types;
this.typeCodes = basicTypes(types);
this.clazz = clazz;
if (!INIT_DONE) {
this.constructor = new MethodHandle[1]; // only one ctor
this.getters = new MethodHandle[types.length()];
this.nominalGetters = new NamedFunction[types.length()];
@Override
protected MethodHandle deriveTransformHelper(MemberName transform, int whichtm) {
if (whichtm == Specializer.TN_COPY_NO_EXTEND) {
return factory();
} else if (whichtm < ARG_TYPE_LIMIT) {
return extendWith((byte) whichtm).factory();
} else {
this.constructor = Factory.makeCtors(clazz, types, null);
this.getters = Factory.makeGetters(clazz, types, null);
this.nominalGetters = Factory.makeNominalGetters(types, null, this.getters);
}
this.extensions = new SpeciesData[ARG_TYPE_LIMIT];
}
private void initForBootstrap() {
assert(!INIT_DONE);
if (constructor() == null) {
String types = typeChars;
CACHE.put(types, this);
Factory.makeCtors(clazz, types, this.constructor);
Factory.makeGetters(clazz, types, this.getters);
Factory.makeNominalGetters(types, this.nominalGetters, this.getters);
throw newInternalError("bad transform");
}
}
private static final ConcurrentMap<String, SpeciesData> CACHE = new ConcurrentHashMap<>();
private static final boolean INIT_DONE; // set after <clinit> finishes...
SpeciesData extendWith(byte type) {
return extendWith(BasicType.basicType(type));
@Override
protected <X> List<X> deriveTransformHelperArguments(MemberName transform, int whichtm, List<X> args, List<X> fields) {
assert(verifyTHAargs(transform, whichtm, args, fields));
// The rule is really simple: Keep the first two arguments
// the same, then put in the fields, then put any other argument.
args.addAll(2, fields);
return args;
}
SpeciesData extendWith(BasicType type) {
int ord = type.ordinal();
SpeciesData d = extensions[ord];
if (d != null) return d;
extensions[ord] = d = get(typeChars+type.basicTypeChar());
return d;
}
private static SpeciesData get(String types) {
return CACHE.computeIfAbsent(types, new Function<String, SpeciesData>() {
@Override
public SpeciesData apply(String types) {
Class<? extends BoundMethodHandle> bmhcl = Factory.getConcreteBMHClass(types);
// SpeciesData instantiation may throw VirtualMachineError because of
// code cache overflow...
SpeciesData speciesData = new SpeciesData(types, bmhcl);
// CHM.computeIfAbsent ensures only one SpeciesData will be set
// successfully on the concrete BMH class if ever
Factory.setSpeciesDataToConcreteBMHClass(bmhcl, speciesData);
// the concrete BMH class is published via SpeciesData instance
// returned here only after it's SPECIES_DATA field is set
return speciesData;
}
});
}
/**
* This is to be called when assertions are enabled. It checks whether SpeciesData for all of the statically
* defined species subclasses of BoundMethodHandle has been added to the SpeciesData cache. See below in the
* static initializer for
*/
static boolean speciesDataCachePopulated() {
Class<BoundMethodHandle> rootCls = BoundMethodHandle.class;
for (Class<?> c : rootCls.getDeclaredClasses()) {
if (rootCls.isAssignableFrom(c)) {
final Class<? extends BoundMethodHandle> cbmh = c.asSubclass(BoundMethodHandle.class);
SpeciesData d = Factory.getSpeciesDataFromConcreteBMHClass(cbmh);
assert(d != null) : cbmh.getName();
assert(d.clazz == cbmh);
assert(CACHE.get(d.typeChars) == d);
}
private boolean verifyTHAargs(MemberName transform, int whichtm, List<?> args, List<?> fields) {
assert(transform == Specializer.BMH_TRANSFORMS.get(whichtm));
assert(args.size() == transform.getMethodType().parameterCount());
assert(fields.size() == this.fieldCount());
final int MH_AND_LF = 2;
if (whichtm == Specializer.TN_COPY_NO_EXTEND) {
assert(transform.getMethodType().parameterCount() == MH_AND_LF);
} else if (whichtm < ARG_TYPE_LIMIT) {
assert(transform.getMethodType().parameterCount() == MH_AND_LF+1);
final BasicType type = basicType((byte) whichtm);
assert(transform.getParameterTypes()[MH_AND_LF] == type.basicTypeClass());
} else {
return false;
}
return true;
}
/*non-public*/ SpeciesData extendWith(byte typeNum) {
SpeciesData sd = extensions[typeNum];
if (sd != null) return sd;
sd = SPECIALIZER.findSpecies(key() + BasicType.basicType(typeNum).basicTypeChar());
extensions[typeNum] = sd;
return sd;
}
}
/*non-public*/
static final Specializer SPECIALIZER = new Specializer();
static {
SimpleMethodHandle.BMH_SPECIES = BoundMethodHandle.SPECIALIZER.findSpecies("");
Species_L.BMH_SPECIES = BoundMethodHandle.SPECIALIZER.findSpecies("L");
}
/*non-public*/
static final class Specializer extends ClassSpecializer<BoundMethodHandle, String, SpeciesData> {
private static final MemberName SPECIES_DATA_ACCESSOR;
static {
// Pre-fill the BMH species-data cache with EMPTY and all BMH's inner subclasses.
EMPTY.initForBootstrap();
Species_L.SPECIES_DATA.initForBootstrap();
// check that all static SpeciesData instances have been initialized
assert speciesDataCachePopulated();
// Note: Do not simplify this, because INIT_DONE must not be
// a compile-time constant during bootstrapping.
INIT_DONE = Boolean.TRUE;
}
}
static SpeciesData getSpeciesData(String types) {
return SpeciesData.get(types);
}
/**
* Generation of concrete BMH classes.
*
* A concrete BMH species is fit for binding a number of values adhering to a
* given type pattern. Reference types are erased.
*
* BMH species are cached by type pattern.
*
* A BMH species has a number of fields with the concrete (possibly erased) types of
* bound values. Setters are provided as an API in BMH. Getters are exposed as MHs,
* which can be included as names in lambda forms.
*/
static class Factory {
private static final String JLO_SIG = "Ljava/lang/Object;";
private static final String MH = "java/lang/invoke/MethodHandle";
private static final String MH_SIG = "L"+MH+";";
private static final String BMH = "java/lang/invoke/BoundMethodHandle";
private static final String BMH_NAME = "java.lang.invoke.BoundMethodHandle";
private static final String BMH_SIG = "L"+BMH+";";
private static final String SPECIES_DATA = "java/lang/invoke/BoundMethodHandle$SpeciesData";
private static final String SPECIES_DATA_SIG = "L"+SPECIES_DATA+";";
private static final String STABLE_SIG = "Ljdk/internal/vm/annotation/Stable;";
private static final String SPECIES_PREFIX_NAME = "Species_";
private static final String SPECIES_PREFIX_PATH = BMH + "$" + SPECIES_PREFIX_NAME;
private static final String SPECIES_CLASS_PREFIX = BMH_NAME + "$" + SPECIES_PREFIX_NAME;
private static final String BMHSPECIES_DATA_EWI_SIG = "(B)" + SPECIES_DATA_SIG;
private static final String MYSPECIES_DATA_SIG = "()" + SPECIES_DATA_SIG;
private static final String INT_SIG = "()I";
private static final String SIG_INCIPIT = "(Ljava/lang/invoke/MethodType;Ljava/lang/invoke/LambdaForm;";
private static final String[] E_THROWABLE = new String[] { "java/lang/Throwable" };
private static final ConcurrentMap<String, Class<? extends BoundMethodHandle>> CLASS_CACHE = new ConcurrentHashMap<>();
/**
* Get a concrete subclass of BMH for a given combination of bound types.
*
* @param types the type signature, wherein reference types are erased to 'L'
* @return the concrete BMH class
*/
static Class<? extends BoundMethodHandle> getConcreteBMHClass(String types) {
// CHM.computeIfAbsent ensures generateConcreteBMHClass is called
// only once per key.
return CLASS_CACHE.computeIfAbsent(
types, new Function<String, Class<? extends BoundMethodHandle>>() {
@Override
public Class<? extends BoundMethodHandle> apply(String types) {
String shortTypes = LambdaForm.shortenSignature(types);
String className = SPECIES_CLASS_PREFIX + shortTypes;
Class<?> c = BootLoader.loadClassOrNull(className);
if (TRACE_RESOLVE) {
System.out.println("[BMH_RESOLVE] " + shortTypes +
(c != null ? " (success)" : " (fail)") );
}
if (c != null) {
return c.asSubclass(BoundMethodHandle.class);
} else {
// Not pregenerated, generate the class
return generateConcreteBMHClass(shortTypes, types);
}
}
});
}
/**
* Generate a concrete subclass of BMH for a given combination of bound types.
*
* A concrete BMH species adheres to the following schema:
*
* <pre>
* class Species_[[types]] extends BoundMethodHandle {
* [[fields]]
* final SpeciesData speciesData() { return SpeciesData.get("[[types]]"); }
* }
* </pre>
*
* The {@code [[types]]} signature is precisely the string that is passed to this
* method.
*
* The {@code [[fields]]} section consists of one field definition per character in
* the type signature, adhering to the naming schema described in the definition of
* {@link #makeFieldName}.
*
* For example, a concrete BMH species for two reference and one integral bound values
* would have the following shape:
*
* <pre>
* class BoundMethodHandle { ... private static
* final class Species_LLI extends BoundMethodHandle {
* final Object argL0;
* final Object argL1;
* final int argI2;
* private Species_LLI(MethodType mt, LambdaForm lf, Object argL0, Object argL1, int argI2) {
* super(mt, lf);
* this.argL0 = argL0;
* this.argL1 = argL1;
* this.argI2 = argI2;
* }
* final SpeciesData speciesData() { return SPECIES_DATA; }
* final int fieldCount() { return 3; }
* &#64;Stable static SpeciesData SPECIES_DATA; // injected afterwards
* static BoundMethodHandle make(MethodType mt, LambdaForm lf, Object argL0, Object argL1, int argI2) {
* return new Species_LLI(mt, lf, argL0, argL1, argI2);
* }
* final BoundMethodHandle copyWith(MethodType mt, LambdaForm lf) {
* return new Species_LLI(mt, lf, argL0, argL1, argI2);
* }
* final BoundMethodHandle copyWithExtendL(MethodType mt, LambdaForm lf, Object narg) {
* return SPECIES_DATA.extendWith(L_TYPE).constructor().invokeBasic(mt, lf, argL0, argL1, argI2, narg);
* }
* final BoundMethodHandle copyWithExtendI(MethodType mt, LambdaForm lf, int narg) {
* return SPECIES_DATA.extendWith(I_TYPE).constructor().invokeBasic(mt, lf, argL0, argL1, argI2, narg);
* }
* final BoundMethodHandle copyWithExtendJ(MethodType mt, LambdaForm lf, long narg) {
* return SPECIES_DATA.extendWith(J_TYPE).constructor().invokeBasic(mt, lf, argL0, argL1, argI2, narg);
* }
* final BoundMethodHandle copyWithExtendF(MethodType mt, LambdaForm lf, float narg) {
* return SPECIES_DATA.extendWith(F_TYPE).constructor().invokeBasic(mt, lf, argL0, argL1, argI2, narg);
* }
* public final BoundMethodHandle copyWithExtendD(MethodType mt, LambdaForm lf, double narg) {
* return SPECIES_DATA.extendWith(D_TYPE).constructor().invokeBasic(mt, lf, argL0, argL1, argI2, narg);
* }
* }
* </pre>
*
* @param types the type signature, wherein reference types are erased to 'L'
* @return the generated concrete BMH class
*/
static Class<? extends BoundMethodHandle> generateConcreteBMHClass(String shortTypes,
String types) {
final String className = speciesInternalClassName(shortTypes);
byte[] classFile = generateConcreteBMHClassBytes(shortTypes, types, className);
// load class
InvokerBytecodeGenerator.maybeDump(className, classFile);
Class<? extends BoundMethodHandle> bmhClass =
UNSAFE.defineClass(className, classFile, 0, classFile.length,
BoundMethodHandle.class.getClassLoader(), null)
.asSubclass(BoundMethodHandle.class);
return bmhClass;
}
static String speciesInternalClassName(String shortTypes) {
return SPECIES_PREFIX_PATH + shortTypes;
}
static byte[] generateConcreteBMHClassBytes(final String shortTypes,
final String types, final String className) {
final String sourceFile = SPECIES_PREFIX_NAME + shortTypes;
final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES);
final int NOT_ACC_PUBLIC = 0; // not ACC_PUBLIC
cw.visit(V1_6, NOT_ACC_PUBLIC + ACC_FINAL + ACC_SUPER, className, null, BMH, null);
cw.visitSource(sourceFile, null);
// emit static types and SPECIES_DATA fields
FieldVisitor fw = cw.visitField(NOT_ACC_PUBLIC + ACC_STATIC, "SPECIES_DATA", SPECIES_DATA_SIG, null, null);
fw.visitAnnotation(STABLE_SIG, true);
fw.visitEnd();
// emit bound argument fields
for (int i = 0; i < types.length(); ++i) {
final char t = types.charAt(i);
final String fieldName = makeFieldName(types, i);
final String fieldDesc = t == 'L' ? JLO_SIG : String.valueOf(t);
cw.visitField(ACC_FINAL, fieldName, fieldDesc, null, null).visitEnd();
}
MethodVisitor mv;
// emit constructor
mv = cw.visitMethod(ACC_PRIVATE, "<init>", makeSignature(types, true), null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0); // this
mv.visitVarInsn(ALOAD, 1); // type
mv.visitVarInsn(ALOAD, 2); // form
mv.visitMethodInsn(INVOKESPECIAL, BMH, "<init>", makeSignature("", true), false);
for (int i = 0, j = 0; i < types.length(); ++i, ++j) {
// i counts the arguments, j counts corresponding argument slots
char t = types.charAt(i);
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(typeLoadOp(t), j + 3); // parameters start at 3
mv.visitFieldInsn(PUTFIELD, className, makeFieldName(types, i), typeSig(t));
if (t == 'J' || t == 'D') {
++j; // adjust argument register access
}
}
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
// emit implementation of speciesData()
mv = cw.visitMethod(NOT_ACC_PUBLIC + ACC_FINAL, "speciesData", MYSPECIES_DATA_SIG, null, null);
mv.visitCode();
mv.visitFieldInsn(GETSTATIC, className, "SPECIES_DATA", SPECIES_DATA_SIG);
mv.visitInsn(ARETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
// emit implementation of fieldCount()
mv = cw.visitMethod(NOT_ACC_PUBLIC + ACC_FINAL, "fieldCount", INT_SIG, null, null);
mv.visitCode();
int fc = types.length();
if (fc <= (ICONST_5 - ICONST_0)) {
mv.visitInsn(ICONST_0 + fc);
} else {
mv.visitIntInsn(SIPUSH, fc);
}
mv.visitInsn(IRETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
// emit make() ...factory method wrapping constructor
mv = cw.visitMethod(NOT_ACC_PUBLIC + ACC_STATIC, "make", makeSignature(types, false), null, null);
mv.visitCode();
// make instance
mv.visitTypeInsn(NEW, className);
mv.visitInsn(DUP);
// load mt, lf
mv.visitVarInsn(ALOAD, 0); // type
mv.visitVarInsn(ALOAD, 1); // form
// load factory method arguments
for (int i = 0, j = 0; i < types.length(); ++i, ++j) {
// i counts the arguments, j counts corresponding argument slots
char t = types.charAt(i);
mv.visitVarInsn(typeLoadOp(t), j + 2); // parameters start at 3
if (t == 'J' || t == 'D') {
++j; // adjust argument register access
}
}
// finally, invoke the constructor and return
mv.visitMethodInsn(INVOKESPECIAL, className, "<init>", makeSignature(types, true), false);
mv.visitInsn(ARETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
// emit copyWith()
mv = cw.visitMethod(NOT_ACC_PUBLIC + ACC_FINAL, "copyWith", makeSignature("", false), null, null);
mv.visitCode();
// make instance
mv.visitTypeInsn(NEW, className);
mv.visitInsn(DUP);
// load mt, lf
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 2);
// put fields on the stack
emitPushFields(types, className, mv);
// finally, invoke the constructor and return
mv.visitMethodInsn(INVOKESPECIAL, className, "<init>", makeSignature(types, true), false);
mv.visitInsn(ARETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
// for each type, emit copyWithExtendT()
for (BasicType type : BasicType.ARG_TYPES) {
int ord = type.ordinal();
char btChar = type.basicTypeChar();
mv = cw.visitMethod(NOT_ACC_PUBLIC + ACC_FINAL, "copyWithExtend" + btChar, makeSignature(String.valueOf(btChar), false), null, E_THROWABLE);
mv.visitCode();
// return SPECIES_DATA.extendWith(t).constructor().invokeBasic(mt, lf, argL0, ..., narg)
// obtain constructor
mv.visitFieldInsn(GETSTATIC, className, "SPECIES_DATA", SPECIES_DATA_SIG);
int iconstInsn = ICONST_0 + ord;
assert(iconstInsn <= ICONST_5);
mv.visitInsn(iconstInsn);
mv.visitMethodInsn(INVOKEVIRTUAL, SPECIES_DATA, "extendWith", BMHSPECIES_DATA_EWI_SIG, false);
mv.visitMethodInsn(INVOKEVIRTUAL, SPECIES_DATA, "constructor", "()" + MH_SIG, false);
// load mt, lf
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 2);
// put fields on the stack
emitPushFields(types, className, mv);
// put narg on stack
mv.visitVarInsn(typeLoadOp(btChar), 3);
// finally, invoke the constructor and return
mv.visitMethodInsn(INVOKEVIRTUAL, MH, "invokeBasic", makeSignature(types + btChar, false), false);
mv.visitInsn(ARETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
private static int typeLoadOp(char t) {
switch (t) {
case 'L': return ALOAD;
case 'I': return ILOAD;
case 'J': return LLOAD;
case 'F': return FLOAD;
case 'D': return DLOAD;
default : throw newInternalError("unrecognized type " + t);
}
}
private static void emitPushFields(String types, String className, MethodVisitor mv) {
for (int i = 0; i < types.length(); ++i) {
char tc = types.charAt(i);
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, className, makeFieldName(types, i), typeSig(tc));
}
}
static String typeSig(char t) {
return t == 'L' ? JLO_SIG : String.valueOf(t);
}
//
// Getter MH generation.
//
private static MethodHandle makeGetter(Class<?> cbmhClass, String types, int index) {
String fieldName = makeFieldName(types, index);
Class<?> fieldType = Wrapper.forBasicType(types.charAt(index)).primitiveType();
try {
return LOOKUP.findGetter(cbmhClass, fieldName, fieldType);
} catch (NoSuchFieldException | IllegalAccessException e) {
throw newInternalError(e);
}
}
static MethodHandle[] makeGetters(Class<?> cbmhClass, String types, MethodHandle[] mhs) {
if (mhs == null) mhs = new MethodHandle[types.length()];
for (int i = 0; i < mhs.length; ++i) {
mhs[i] = makeGetter(cbmhClass, types, i);
assert(mhs[i].internalMemberName().getDeclaringClass() == cbmhClass);
}
return mhs;
}
static MethodHandle[] makeCtors(Class<? extends BoundMethodHandle> cbmh, String types, MethodHandle mhs[]) {
if (mhs == null) mhs = new MethodHandle[1];
if (types.equals("")) return mhs; // hack for empty BMH species
mhs[0] = makeCbmhCtor(cbmh, types);
return mhs;
}
static NamedFunction[] makeNominalGetters(String types, NamedFunction[] nfs, MethodHandle[] getters) {
if (nfs == null) nfs = new NamedFunction[types.length()];
for (int i = 0; i < nfs.length; ++i) {
nfs[i] = new NamedFunction(getters[i]);
}
return nfs;
}
//
// Auxiliary methods.
//
static SpeciesData getSpeciesDataFromConcreteBMHClass(Class<? extends BoundMethodHandle> cbmh) {
try {
Field F_SPECIES_DATA = cbmh.getDeclaredField("SPECIES_DATA");
return (SpeciesData) F_SPECIES_DATA.get(null);
SPECIES_DATA_ACCESSOR = IMPL_LOOKUP.resolveOrFail(REF_invokeVirtual, BoundMethodHandle.class,
"speciesData", MethodType.methodType(BoundMethodHandle.SpeciesData.class));
} catch (ReflectiveOperationException ex) {
throw newInternalError(ex);
throw newInternalError("Bootstrap link error", ex);
}
}
static void setSpeciesDataToConcreteBMHClass(Class<? extends BoundMethodHandle> cbmh, SpeciesData speciesData) {
private Specializer() {
super( // Reified type parameters:
BoundMethodHandle.class, String.class, BoundMethodHandle.SpeciesData.class,
// Principal constructor type:
MethodType.methodType(void.class, MethodType.class, LambdaForm.class),
// Required linkage between class and species:
SPECIES_DATA_ACCESSOR,
"BMH_SPECIES",
BMH_TRANSFORMS);
}
@Override
protected String topSpeciesKey() {
return "";
}
@Override
protected BoundMethodHandle.SpeciesData newSpeciesData(String key) {
return new BoundMethodHandle.SpeciesData(this, key);
}
static final List<MemberName> BMH_TRANSFORMS;
static final int TN_COPY_NO_EXTEND = V_TYPE_NUM;
static {
final Class<BoundMethodHandle> BMH = BoundMethodHandle.class;
// copyWithExtendLIJFD + copyWith
try {
Field F_SPECIES_DATA = cbmh.getDeclaredField("SPECIES_DATA");
// ## FIXME: annotation parser can't create proxy classes until module system is fully initialzed
// assert F_SPECIES_DATA.getDeclaredAnnotation(Stable.class) != null;
F_SPECIES_DATA.set(null, speciesData);
BMH_TRANSFORMS = List.of(
IMPL_LOOKUP.resolveOrFail(REF_invokeVirtual, BMH, "copyWithExtendL", MethodType.methodType(BMH, MethodType.class, LambdaForm.class, Object.class)),
IMPL_LOOKUP.resolveOrFail(REF_invokeVirtual, BMH, "copyWithExtendI", MethodType.methodType(BMH, MethodType.class, LambdaForm.class, int.class)),
IMPL_LOOKUP.resolveOrFail(REF_invokeVirtual, BMH, "copyWithExtendJ", MethodType.methodType(BMH, MethodType.class, LambdaForm.class, long.class)),
IMPL_LOOKUP.resolveOrFail(REF_invokeVirtual, BMH, "copyWithExtendF", MethodType.methodType(BMH, MethodType.class, LambdaForm.class, float.class)),
IMPL_LOOKUP.resolveOrFail(REF_invokeVirtual, BMH, "copyWithExtendD", MethodType.methodType(BMH, MethodType.class, LambdaForm.class, double.class)),
IMPL_LOOKUP.resolveOrFail(REF_invokeVirtual, BMH, "copyWith", MethodType.methodType(BMH, MethodType.class, LambdaForm.class))
);
} catch (ReflectiveOperationException ex) {
throw newInternalError(ex);
throw newInternalError("Failed resolving copyWith methods", ex);
}
// as it happens, there is one transform per BasicType including V_TYPE
assert(BMH_TRANSFORMS.size() == TYPE_LIMIT);
}
/**
* Field names in concrete BMHs adhere to this pattern:
* arg + type + index
* where type is a single character (L, I, J, F, D).
* Generation of concrete BMH classes.
*
* A concrete BMH species is fit for binding a number of values adhering to a
* given type pattern. Reference types are erased.
*
* BMH species are cached by type pattern.
*
* A BMH species has a number of fields with the concrete (possibly erased) types of
* bound values. Setters are provided as an API in BMH. Getters are exposed as MHs,
* which can be included as names in lambda forms.
*/
private static String makeFieldName(String types, int index) {
assert index >= 0 && index < types.length();
return "arg" + types.charAt(index) + index;
}
private static String makeSignature(String types, boolean ctor) {
StringBuilder buf = new StringBuilder(SIG_INCIPIT);
int len = types.length();
for (int i = 0; i < len; i++) {
buf.append(typeSig(types.charAt(i)));
}
return buf.append(')').append(ctor ? "V" : BMH_SIG).toString();
}
private static MethodType makeConstructorType(String types) {
int length = types.length();
Class<?> ptypes[] = new Class<?>[length + 2];
ptypes[0] = MethodType.class;
ptypes[1] = LambdaForm.class;
for (int i = 0; i < length; i++) {
ptypes[i + 2] = BasicType.basicType(types.charAt(i)).basicTypeClass();
}
return MethodType.makeImpl(BoundMethodHandle.class, ptypes, true);
}
static MethodHandle makeCbmhCtor(Class<? extends BoundMethodHandle> cbmh, String types) {
try {
return LOOKUP.findStatic(cbmh, "make", makeConstructorType(types));
} catch (NoSuchMethodException | IllegalAccessException | IllegalArgumentException | TypeNotPresentException e) {
throw newInternalError(e);
class Factory extends ClassSpecializer<BoundMethodHandle, String, BoundMethodHandle.SpeciesData>.Factory {
@Override
protected String chooseFieldName(Class<?> type, int index) {
return "arg" + super.chooseFieldName(type, index);
}
}
}
static final Lookup LOOKUP = Lookup.IMPL_LOOKUP;
@Override
protected Factory makeFactory() {
return new Factory();
}
}
/**
* All subclasses must provide such a value describing their type signature.
*/
static final SpeciesData SPECIES_DATA = SpeciesData.EMPTY;
private static final SpeciesData[] SPECIES_DATA_CACHE = new SpeciesData[6];
private static SpeciesData checkCache(int size, String types) {
int idx = size - 1;
SpeciesData data = SPECIES_DATA_CACHE[idx];
if (data != null) return data;
SPECIES_DATA_CACHE[idx] = data = getSpeciesData(types);
return data;
}
static SpeciesData speciesData_L() { return checkCache(1, "L"); }
static SpeciesData speciesData_LL() { return checkCache(2, "LL"); }
static SpeciesData speciesData_LLL() { return checkCache(3, "LLL"); }
static SpeciesData speciesData_LLLL() { return checkCache(4, "LLLL"); }
static SpeciesData speciesData_LLLLL() { return checkCache(5, "LLLLL"); }
static SpeciesData speciesData_L() { return Species_L.BMH_SPECIES; }
static SpeciesData speciesData_LL() { return SPECIALIZER.findSpecies("LL"); }
static SpeciesData speciesData_LLL() { return SPECIALIZER.findSpecies("LLL"); }
static SpeciesData speciesData_LLLL() { return SPECIALIZER.findSpecies("LLLL"); }
static SpeciesData speciesData_LLLLL() { return SPECIALIZER.findSpecies("LLLLL"); }
}

1030
src/java.base/share/classes/java/lang/invoke/ClassSpecializer.java Normal file
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File diff suppressed because it is too large Load Diff

26
src/java.base/share/classes/java/lang/invoke/GenerateJLIClassesHelper.java
View File

@ -25,14 +25,14 @@
package java.lang.invoke;
import java.util.Map;
import jdk.internal.org.objectweb.asm.ClassWriter;
import jdk.internal.org.objectweb.asm.Opcodes;
import java.util.ArrayList;
import java.util.HashSet;
import sun.invoke.util.Wrapper;
import static java.lang.invoke.MethodHandleNatives.Constants.*;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
/**
* Helper class to assist the GenerateJLIClassesPlugin to get access to
@ -118,8 +118,7 @@ class GenerateJLIClassesHelper {
// require an even more complex naming scheme
LambdaForm reinvoker = makeReinvokerFor(methodTypes[i]);
forms.add(reinvoker);
String speciesSig = BoundMethodHandle
.speciesData(reinvoker).fieldSignature();
String speciesSig = BoundMethodHandle.speciesDataFor(reinvoker).key();
assert(speciesSig.equals("L"));
names.add(reinvoker.kind.defaultLambdaName + "_" + speciesSig);
@ -205,20 +204,19 @@ class GenerateJLIClassesHelper {
DelegatingMethodHandle.NF_getTarget);
}
static Map.Entry<String, byte[]> generateConcreteBMHClassBytes(
final String types) {
@SuppressWarnings({"rawtypes", "unchecked"})
static Map.Entry<String, byte[]> generateConcreteBMHClassBytes(final String types) {
for (char c : types.toCharArray()) {
if ("LIJFD".indexOf(c) < 0) {
throw new IllegalArgumentException("All characters must "
+ "correspond to a basic field type: LIJFD");
}
}
String shortTypes = LambdaForm.shortenSignature(types);
final String className =
BoundMethodHandle.Factory.speciesInternalClassName(shortTypes);
return Map.entry(className,
BoundMethodHandle.Factory.generateConcreteBMHClassBytes(
shortTypes, types, className));
final BoundMethodHandle.SpeciesData species = BoundMethodHandle.SPECIALIZER.findSpecies(types);
final String className = species.speciesCode().getName();
final ClassSpecializer.Factory factory = BoundMethodHandle.SPECIALIZER.factory();
final byte[] code = factory.generateConcreteSpeciesCodeFile(className, species);
return Map.entry(className.replace('.', '/'), code);
}
}

5
src/java.base/share/classes/java/lang/invoke/InvokerBytecodeGenerator.java
View File

@ -183,8 +183,7 @@ class InvokerBytecodeGenerator {
new java.security.PrivilegedAction<>() {
public Void run() {
try {
String dumpName = className;
//dumpName = dumpName.replace('/', '-');
String dumpName = className.replace('.','/');
File dumpFile = new File(DUMP_CLASS_FILES_DIR, dumpName+".class");
System.out.println("dump: " + dumpFile);
dumpFile.getParentFile().mkdirs();
@ -630,7 +629,7 @@ class InvokerBytecodeGenerator {
String name = form.kind.methodName;
switch (form.kind) {
case BOUND_REINVOKER: {
name = name + "_" + BoundMethodHandle.speciesData(form).fieldSignature();
name = name + "_" + BoundMethodHandle.speciesDataFor(form).key();
return resolveFrom(name, invokerType, DelegatingMethodHandle.Holder.class);
}
case DELEGATE: return resolveFrom(name, invokerType, DelegatingMethodHandle.Holder.class);

35
src/java.base/share/classes/java/lang/invoke/LambdaForm.java
View File

@ -143,12 +143,22 @@ class LambdaForm {
D_TYPE('D', double.class, Wrapper.DOUBLE), // all primitive types
V_TYPE('V', void.class, Wrapper.VOID); // not valid in all contexts
static final BasicType[] ALL_TYPES = BasicType.values();
static final BasicType[] ARG_TYPES = Arrays.copyOf(ALL_TYPES, ALL_TYPES.length-1);
static final @Stable BasicType[] ALL_TYPES = BasicType.values();
static final @Stable BasicType[] ARG_TYPES = Arrays.copyOf(ALL_TYPES, ALL_TYPES.length-1);
static final int ARG_TYPE_LIMIT = ARG_TYPES.length;
static final int TYPE_LIMIT = ALL_TYPES.length;
// Derived int constants, which (unlike the enums) can be constant folded.
// We can remove them when JDK-8161245 is fixed.
static final byte
L_TYPE_NUM = (byte) L_TYPE.ordinal(),
I_TYPE_NUM = (byte) I_TYPE.ordinal(),
J_TYPE_NUM = (byte) J_TYPE.ordinal(),
F_TYPE_NUM = (byte) F_TYPE.ordinal(),
D_TYPE_NUM = (byte) D_TYPE.ordinal(),
V_TYPE_NUM = (byte) V_TYPE.ordinal();
final char btChar;
final Class<?> btClass;
final Wrapper btWrapper;
@ -679,6 +689,9 @@ class LambdaForm {
Class<?> rtype = signatureReturn(sig).btClass;
return MethodType.makeImpl(rtype, ptypes, true);
}
static MethodType basicMethodType(MethodType mt) {
return signatureType(basicTypeSignature(mt));
}
/**
* Check if i-th name is a call to MethodHandleImpl.selectAlternative.
@ -1291,14 +1304,28 @@ class LambdaForm {
assert(sigp == sig.length);
return String.valueOf(sig);
}
/** Hack to make signatures more readable when they show up in method names.
* Signature should start with a sequence of uppercase ASCII letters.
* Runs of three or more are replaced by a single letter plus a decimal repeat count.
* A tail of anything other than uppercase ASCII is passed through unchanged.
* @param signature sequence of uppercase ASCII letters with possible repetitions
* @return same sequence, with repetitions counted by decimal numerals
*/
public static String shortenSignature(String signature) {
// Hack to make signatures more readable when they show up in method names.
final int NO_CHAR = -1, MIN_RUN = 3;
int c0, c1 = NO_CHAR, c1reps = 0;
StringBuilder buf = null;
int len = signature.length();
if (len < MIN_RUN) return signature;
for (int i = 0; i <= len; i++) {
if (c1 != NO_CHAR && !('A' <= c1 && c1 <= 'Z')) {
// wrong kind of char; bail out here
if (buf != null) {
buf.append(signature.substring(i - c1reps, len));
}
break;
}
// shift in the next char:
c0 = c1; c1 = (i == len ? NO_CHAR : signature.charAt(i));
if (c1 == c0) { ++c1reps; continue; }
@ -1342,7 +1369,7 @@ class LambdaForm {
this.arguments = that.arguments;
this.constraint = constraint;
assert(constraint == null || isParam()); // only params have constraints
assert(constraint == null || constraint instanceof BoundMethodHandle.SpeciesData || constraint instanceof Class);
assert(constraint == null || constraint instanceof ClassSpecializer.SpeciesData || constraint instanceof Class);
}
Name(MethodHandle function, Object... arguments) {
this(new NamedFunction(function), arguments);

10
src/java.base/share/classes/java/lang/invoke/LambdaFormBuffer.java
View File

@ -27,6 +27,8 @@ package java.lang.invoke;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static java.lang.invoke.LambdaForm.*;
import static java.lang.invoke.LambdaForm.BasicType.*;
@ -325,15 +327,15 @@ final class LambdaFormBuffer {
* whose function is in the corresponding position in newFns.
* Only do this if the arguments are exactly equal to the given.
*/
LambdaFormBuffer replaceFunctions(NamedFunction[] oldFns, NamedFunction[] newFns,
LambdaFormBuffer replaceFunctions(List<NamedFunction> oldFns, List<NamedFunction> newFns,
Object... forArguments) {
assert(inTrans());
if (oldFns.length == 0) return this;
if (oldFns.isEmpty()) return this;
for (int i = arity; i < length; i++) {
Name n = names[i];
int nfi = indexOf(n.function, oldFns);
int nfi = oldFns.indexOf(n.function);
if (nfi >= 0 && Arrays.equals(n.arguments, forArguments)) {
changeName(i, new Name(newFns[nfi], n.arguments));
changeName(i, new Name(newFns.get(nfi), n.arguments));
}
}
return this;

7
src/java.base/share/classes/java/lang/invoke/LambdaFormEditor.java
View File

@ -381,10 +381,11 @@ class LambdaFormEditor {
/// Editing methods for method handles. These need to have fast paths.
private BoundMethodHandle.SpeciesData oldSpeciesData() {
return BoundMethodHandle.speciesData(lambdaForm);
return BoundMethodHandle.speciesDataFor(lambdaForm);
}
private BoundMethodHandle.SpeciesData newSpeciesData(BasicType type) {
return oldSpeciesData().extendWith(type);
return oldSpeciesData().extendWith((byte) type.ordinal());
}
BoundMethodHandle bindArgumentL(BoundMethodHandle mh, int pos, Object value) {
@ -461,7 +462,7 @@ class LambdaFormEditor {
buf.replaceParameterByNewExpression(pos, new Name(getter, newBaseAddress));
} else {
// cannot bind the MH arg itself, unless oldData is empty
assert(oldData == BoundMethodHandle.SpeciesData.EMPTY);
assert(oldData == BoundMethodHandle.SPECIALIZER.topSpecies());
newBaseAddress = new Name(L_TYPE).withConstraint(newData);
buf.replaceParameterByNewExpression(0, new Name(getter, newBaseAddress));
buf.insertParameter(0, newBaseAddress);

10
src/java.base/share/classes/java/lang/invoke/MethodHandleImpl.java
View File

@ -776,11 +776,11 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
if (PROFILE_GWT) {
int[] counts = new int[2];
mh = (BoundMethodHandle)
BoundMethodHandle.speciesData_LLLL().constructor().invokeBasic(type, form,
BoundMethodHandle.speciesData_LLLL().factory().invokeBasic(type, form,
(Object) test, (Object) profile(target), (Object) profile(fallback), counts);
} else {
mh = (BoundMethodHandle)
BoundMethodHandle.speciesData_LLL().constructor().invokeBasic(type, form,
BoundMethodHandle.speciesData_LLL().factory().invokeBasic(type, form,
(Object) test, (Object) profile(target), (Object) profile(fallback));
}
} catch (Throwable ex) {
@ -1089,7 +1089,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
BoundMethodHandle.SpeciesData data = BoundMethodHandle.speciesData_LLLLL();
BoundMethodHandle mh;
try {
mh = (BoundMethodHandle) data.constructor().invokeBasic(type, form, (Object) target, (Object) exType,
mh = (BoundMethodHandle) data.factory().invokeBasic(type, form, (Object) target, (Object) exType,
(Object) catcher, (Object) collectArgs, (Object) unboxResult);
} catch (Throwable ex) {
throw uncaughtException(ex);
@ -1885,7 +1885,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
BoundMethodHandle.SpeciesData data = BoundMethodHandle.speciesData_LLL();
BoundMethodHandle mh;
try {
mh = (BoundMethodHandle) data.constructor().invokeBasic(type, form, (Object) clauseData,
mh = (BoundMethodHandle) data.factory().invokeBasic(type, form, (Object) clauseData,
(Object) collectArgs, (Object) unboxResult);
} catch (Throwable ex) {
throw uncaughtException(ex);
@ -2128,7 +2128,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
BoundMethodHandle.SpeciesData data = BoundMethodHandle.speciesData_LLLL();
BoundMethodHandle mh;
try {
mh = (BoundMethodHandle) data.constructor().invokeBasic(type, form, (Object) target, (Object) cleanup,
mh = (BoundMethodHandle) data.factory().invokeBasic(type, form, (Object) target, (Object) cleanup,
(Object) collectArgs, (Object) unboxResult);
} catch (Throwable ex) {
throw uncaughtException(ex);

23
src/java.base/share/classes/java/lang/invoke/SimpleMethodHandle.java
View File

@ -25,6 +25,8 @@
package java.lang.invoke;
import jdk.internal.vm.annotation.Stable;
import static java.lang.invoke.LambdaForm.BasicType.*;
import static java.lang.invoke.MethodHandleStatics.*;
@ -33,6 +35,7 @@ import static java.lang.invoke.MethodHandleStatics.*;
* @author jrose
*/
final class SimpleMethodHandle extends BoundMethodHandle {
private SimpleMethodHandle(MethodType type, LambdaForm form) {
super(type, form);
}
@ -41,10 +44,11 @@ final class SimpleMethodHandle extends BoundMethodHandle {
return new SimpleMethodHandle(type, form);
}
/*non-public*/ static final SpeciesData SPECIES_DATA = SpeciesData.EMPTY;
/*non-public*/ static @Stable BoundMethodHandle.SpeciesData BMH_SPECIES;
/*non-public*/ public SpeciesData speciesData() {
return SPECIES_DATA;
@Override
/*non-public*/ BoundMethodHandle.SpeciesData speciesData() {
return BMH_SPECIES;
}
@Override
@ -57,11 +61,6 @@ final class SimpleMethodHandle extends BoundMethodHandle {
return "\n& Class="+getClass().getSimpleName();
}
@Override
/*non-public*/ public int fieldCount() {
return 0;
}
@Override
/*non-public*/ final BoundMethodHandle copyWithExtendL(MethodType mt, LambdaForm lf, Object narg) {
return BoundMethodHandle.bindSingle(mt, lf, narg); // Use known fast path.
@ -69,7 +68,7 @@ final class SimpleMethodHandle extends BoundMethodHandle {
@Override
/*non-public*/ final BoundMethodHandle copyWithExtendI(MethodType mt, LambdaForm lf, int narg) {
try {
return (BoundMethodHandle) SPECIES_DATA.extendWith(I_TYPE).constructor().invokeBasic(mt, lf, narg);
return (BoundMethodHandle) BMH_SPECIES.extendWith(I_TYPE_NUM).factory().invokeBasic(mt, lf, narg);
} catch (Throwable ex) {
throw uncaughtException(ex);
}
@ -77,7 +76,7 @@ final class SimpleMethodHandle extends BoundMethodHandle {
@Override
/*non-public*/ final BoundMethodHandle copyWithExtendJ(MethodType mt, LambdaForm lf, long narg) {
try {
return (BoundMethodHandle) SPECIES_DATA.extendWith(J_TYPE).constructor().invokeBasic(mt, lf, narg);
return (BoundMethodHandle) BMH_SPECIES.extendWith(J_TYPE_NUM).factory().invokeBasic(mt, lf, narg);
} catch (Throwable ex) {
throw uncaughtException(ex);
}
@ -85,7 +84,7 @@ final class SimpleMethodHandle extends BoundMethodHandle {
@Override
/*non-public*/ final BoundMethodHandle copyWithExtendF(MethodType mt, LambdaForm lf, float narg) {
try {
return (BoundMethodHandle) SPECIES_DATA.extendWith(F_TYPE).constructor().invokeBasic(mt, lf, narg);
return (BoundMethodHandle) BMH_SPECIES.extendWith(F_TYPE_NUM).factory().invokeBasic(mt, lf, narg);
} catch (Throwable ex) {
throw uncaughtException(ex);
}
@ -93,7 +92,7 @@ final class SimpleMethodHandle extends BoundMethodHandle {
@Override
/*non-public*/ final BoundMethodHandle copyWithExtendD(MethodType mt, LambdaForm lf, double narg) {
try {
return (BoundMethodHandle) SPECIES_DATA.extendWith(D_TYPE).constructor().invokeBasic(mt, lf, narg);
return (BoundMethodHandle) BMH_SPECIES.extendWith(D_TYPE_NUM).factory().invokeBasic(mt, lf, narg);
} catch (Throwable ex) {
throw uncaughtException(ex);
}

12
src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/GenerateJLIClassesPlugin.java
View File

@ -242,8 +242,14 @@ public final class GenerateJLIClassesPlugin implements Plugin {
lines.map(line -> line.split(" "))
.forEach(parts -> {
switch (parts[0]) {
case "[BMH_RESOLVE]":
speciesTypes.add(expandSignature(parts[1]));
case "[SPECIES_RESOLVE]":
// Allow for new types of species data classes being resolved here
if (parts.length == 3 && parts[1].startsWith("java.lang.invoke.BoundMethodHandle$Species_")) {
String species = parts[1].substring("java.lang.invoke.BoundMethodHandle$Species_".length());
if (!"L".equals(species)) {
speciesTypes.add(expandSignature(species));
}
}
break;
case "[LF_RESOLVE]":
String methodType = parts[3];
@ -449,7 +455,7 @@ public final class GenerateJLIClassesPlugin implements Plugin {
"/java.base/" + INVOKERS_HOLDER + ".class";
// Convert LL -> LL, L3 -> LLL
private static String expandSignature(String signature) {
public static String expandSignature(String signature) {
StringBuilder sb = new StringBuilder();
char last = 'X';
int count = 0;

82
test/jdk/java/lang/invoke/ClassSpecializerTest.java Normal file
View File

@ -0,0 +1,82 @@
/*
* 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
* @summary Smoke-test class specializer, used to create BoundMethodHandle classes
* @compile/module=java.base java/lang/invoke/ClassSpecializerHelper.java
* @run testng/othervm/timeout=250 -ea -esa ClassSpecializerTest
*/
// Useful diagnostics to try:
// -Djava.lang.invoke.MethodHandle.TRACE_RESOLVE=true
// -Djava.lang.invoke.MethodHandle.DUMP_CLASS_FILES=true
import org.testng.annotations.*;
import java.lang.invoke.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static java.lang.invoke.ClassSpecializerHelper.*;
public class ClassSpecializerTest {
@Test
public void testFindSpecies() throws Throwable {
System.out.println("testFindSpecies");
System.out.println("test = " + SPEC_TEST);
ArrayList<Object> args = new ArrayList<>();
for (int key = 0; key <= Kind.MAX_KEY; key++) {
Kind k = SpecTest.kind(key);
System.out.println("k = " + k);
MethodHandle mh = k.factory();
System.out.println("k.f = " + mh);
args.clear();
for (Class<?> pt : mh.type().parameterList()) {
args.add(coughUpA(pt));
}
args.set(0, key * 1000 + 42);
Frob f = (Frob) mh.invokeWithArguments(args.toArray());
assert(f.kind() == k);
System.out.println("k.f(...) = " + f.toString());
List<Object> l = f.asList();
System.out.println("f.l = " + l);
args.subList(0,1).clear(); // drop label
assert(args.equals(l));
}
}
private static Object coughUpA(Class<?> pt) throws Throwable {
if (pt == String.class) return "foo";
if (pt.isArray()) return java.lang.reflect.Array.newInstance(pt.getComponentType(), 2);
if (pt == Integer.class) return 42;
if (pt == Double.class) return 3.14;
if (pt.isAssignableFrom(List.class))
return Arrays.asList("hello", "world", "from", pt.getSimpleName());
return MethodHandles.zero(pt).invoke();
}
public static void main(String... av) throws Throwable {
System.out.println("TEST: ClassSpecializerTest");
new ClassSpecializerTest().testFindSpecies();
}
}

155
test/jdk/java/lang/invoke/java.base/java/lang/invoke/ClassSpecializerHelper.java Normal file
View File

@ -0,0 +1,155 @@
/*
* 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.
*/
package java.lang.invoke;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static java.lang.invoke.MethodHandleNatives.Constants.*;
/**
* Helper class, injected into java.lang.invoke,
* that bridges to the private ClassSpecializer mechanism.
*/
public interface ClassSpecializerHelper {
interface Frob {
Kind kind();
int label();
List<Object> asList();
}
abstract class FrobImpl implements Frob {
private final int label;
public FrobImpl(int label) {
this.label = label;
}
public int label() { return label; }
@Override public abstract Kind kind();
public String toString() {
final StringBuilder buf = new StringBuilder();
buf.append("Frob[label=").append(label);
final Kind k = kind();
if (k != null) {
for (MethodHandle mh : k.getters()) {
Object x = "?";
try {
x = mh.invoke(this);
} catch (Throwable ex) {
x = "<<"+ex.getMessage()+">>";
}
buf.append(", ").append(x);
}
}
buf.append("]");
return buf.toString();
}
public List<Object> asList() {
final List<MethodHandle> getters = kind().getters();
ArrayList<Object> res = new ArrayList<>(getters.size());
for (MethodHandle getter : getters) {
try {
res.add(getter.invoke(this));
} catch (Throwable ex) {
throw new AssertionError(ex);
}
}
return res;
}
}
public static class Kind extends ClassSpecializer<Frob, Byte, Kind>.SpeciesData {
public Kind(SpecTest outer, Byte key) {
outer.super(key);
}
public MethodHandle factory() {
return super.factory();
}
public List<MethodHandle> getters() {
return super.getters();
}
private static final List<Class<?>> FIELD_TYPES
= Arrays.asList(String.class, float.class, Double.class, boolean.class, Object[].class, Object.class);
public static int MAX_KEY = FIELD_TYPES.size();
@Override
protected List<Class<?>> deriveFieldTypes(Byte key) {
return FIELD_TYPES.subList(0, key);
}
@Override
protected Class<? extends Frob> deriveSuperClass() {
return FrobImpl.class;
}
@Override
protected MethodHandle deriveTransformHelper(MemberName transform, int whichtm) {
throw new AssertionError();
}
@Override
protected <X> List<X> deriveTransformHelperArguments(MemberName transform, int whichtm, List<X> args, List<X> fields) {
throw new AssertionError();
}
}
class SpecTest extends ClassSpecializer<Frob, Byte, Kind> {
private static final MemberName SPECIES_DATA_ACCESSOR;
static {
try {
SPECIES_DATA_ACCESSOR = MethodHandles.publicLookup()
.resolveOrFail(REF_invokeVirtual, FrobImpl.class, "kind", MethodType.methodType(Kind.class));
} catch (ReflectiveOperationException ex) {
throw new AssertionError("Bootstrap link error", ex);
}
}
public SpecTest() {
super(Frob.class, Byte.class, Kind.class,
MethodType.methodType(void.class, int.class),
SPECIES_DATA_ACCESSOR,
"KIND",
Arrays.asList());
}
@Override
protected Kind newSpeciesData(Byte key) {
return new Kind(this, key);
}
public static Kind kind(int key) {
return (Kind) SPEC_TEST.findSpecies((byte)key);
}
}
static final SpecTest SPEC_TEST = new SpecTest();
}

23
test/jdk/tools/jlink/plugins/GenerateJLIClassesPluginTest.java
View File

@ -21,6 +21,8 @@
* questions.
*/
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collection;
import java.util.List;
@ -74,11 +76,30 @@ public class GenerateJLIClassesPluginTest {
classFilesForSpecies(GenerateJLIClassesPlugin.defaultSpecies()),
List.of());
// Check that --generate-jli-classes=@file works as intended
Path baseFile = Files.createTempFile("base", "trace");
String species = "LLLLLLLLLLLLLLLLLLL";
String fileString = "[SPECIES_RESOLVE] java.lang.invoke.BoundMethodHandle$Species_" + species + " (salvaged)\n";
Files.write(baseFile, fileString.getBytes(Charset.defaultCharset()));
result = JImageGenerator.getJLinkTask()
.modulePath(helper.defaultModulePath())
.output(helper.createNewImageDir("generate-jli-file"))
.option("--generate-jli-classes=@" + baseFile.toString())
.addMods("java.base")
.call();
image = result.assertSuccess();
JImageValidator.validate(
image.resolve("lib").resolve("modules"),
classFilesForSpecies(List.of(species)), // species should be in the image
classFilesForSpecies(List.of(species.substring(1)))); // but not it's immediate parent
}
private static List<String> classFilesForSpecies(Collection<String> species) {
return species.stream()
.map(s -> "/java.base/java/lang/invoke/BoundMethodHandle$Species_" + s + ".class")
.map(s -> "/java.base/java/lang/invoke/BoundMethodHandle$Species_"
+ GenerateJLIClassesPlugin.expandSignature(s) + ".class")
.collect(Collectors.toList());
}
}