47 import java.util.*;
48 import java.util.function.Consumer;
49 import java.util.function.Function;
50
51 /**
52 * Utility class for building method handles.
53 */
54 public class MethodHandleBuilder {
55
56 static final Unsafe UNSAFE = Unsafe.getUnsafe();
57
58 public static final boolean ENABLE_POOL_PATCHES;
59
60 static {
61 Properties props = GetPropertyAction.privilegedGetProperties();
62 ENABLE_POOL_PATCHES = Boolean.parseBoolean(
63 props.getProperty("valhalla.enablePoolPatches"));
64 }
65
66 public static MethodHandle loadCode(Lookup lookup, String name, MethodType type, Consumer<? super MethodHandleCodeBuilder<?>> builder) {
67 return loadCode(lookup, name, type.toMethodDescriptorString(), builder);
68 }
69
70 public static MethodHandle loadCode(Lookup lookup, String name, String type, Consumer<? super MethodHandleCodeBuilder<?>> builder) {
71 return loadCode(lookup, name, name, type, MethodHandleCodeBuilder::new,
72 clazz -> {
73 try {
74 return lookup.findStatic(clazz, name, MethodType.fromMethodDescriptorString(type, lookup.lookupClass().getClassLoader()));
75 } catch (ReflectiveOperationException ex) {
76 throw new IllegalStateException(ex);
77 }
78 },
79 builder);
80 }
81
82 protected static <Z, C extends CodeBuilder<Class<?>, String, byte[], ?>> Z loadCode(
83 Lookup lookup, String className, String methodName, String type,
84 Function<MethodBuilder<Class<?>, String, byte[]>, ? extends C> builderFunc,
85 Function<Class<?>, Z> resFunc, Consumer<? super C> builder) {
86
87 IsolatedMethodBuilder isolatedMethodBuilder = new IsolatedMethodBuilder(className, lookup);
88 isolatedMethodBuilder
89 .withSuperclass(Object.class)
90 .withMajorVersion(52)
91 .withMinorVersion(0)
92 .withFlags(Flag.ACC_PUBLIC)
93 .withMethod(methodName, type, M ->
94 M.withFlags(Flag.ACC_STATIC, Flag.ACC_PUBLIC)
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47 import java.util.*;
48 import java.util.function.Consumer;
49 import java.util.function.Function;
50
51 /**
52 * Utility class for building method handles.
53 */
54 public class MethodHandleBuilder {
55
56 static final Unsafe UNSAFE = Unsafe.getUnsafe();
57
58 public static final boolean ENABLE_POOL_PATCHES;
59
60 static {
61 Properties props = GetPropertyAction.privilegedGetProperties();
62 ENABLE_POOL_PATCHES = Boolean.parseBoolean(
63 props.getProperty("valhalla.enablePoolPatches"));
64 }
65
66 public static MethodHandle loadCode(Lookup lookup, String name, MethodType type, Consumer<? super MethodHandleCodeBuilder<?>> builder) {
67 return loadCode(lookup, name, name, type, builder);
68 }
69
70 public static MethodHandle loadCode(Lookup lookup, String className, String methodName, MethodType type, Consumer<? super MethodHandleCodeBuilder<?>> builder) {
71 String descriptor = type.toMethodDescriptorString();
72 return loadCode(lookup, className, methodName, descriptor, MethodHandleCodeBuilder::new,
73 clazz -> {
74 try {
75 return lookup.findStatic(clazz, methodName, MethodType.fromMethodDescriptorString(descriptor, lookup.lookupClass().getClassLoader()));
76 } catch (ReflectiveOperationException ex) {
77 throw new IllegalStateException(ex);
78 }
79 },
80 builder);
81 }
82
83 protected static <Z, C extends CodeBuilder<Class<?>, String, byte[], ?>> Z loadCode(
84 Lookup lookup, String className, String methodName, String type,
85 Function<MethodBuilder<Class<?>, String, byte[]>, ? extends C> builderFunc,
86 Function<Class<?>, Z> resFunc, Consumer<? super C> builder) {
87
88 IsolatedMethodBuilder isolatedMethodBuilder = new IsolatedMethodBuilder(className, lookup);
89 isolatedMethodBuilder
90 .withSuperclass(Object.class)
91 .withMajorVersion(52)
92 .withMinorVersion(0)
93 .withFlags(Flag.ACC_PUBLIC)
94 .withMethod(methodName, type, M ->
95 M.withFlags(Flag.ACC_STATIC, Flag.ACC_PUBLIC)
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