16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.nashorn.internal.runtime.linker;
27
28 import static jdk.nashorn.internal.codegen.CompilerConstants.staticCallNoLookup;
29 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
30
31 import java.lang.invoke.CallSite;
32 import java.lang.invoke.MethodHandle;
33 import java.lang.invoke.MethodHandles;
34 import java.lang.invoke.MethodHandles.Lookup;
35 import java.lang.invoke.MethodType;
36 import jdk.dynalink.CallSiteDescriptor;
37 import jdk.dynalink.DynamicLinker;
38 import jdk.dynalink.DynamicLinkerFactory;
39 import jdk.dynalink.beans.BeansLinker;
40 import jdk.dynalink.beans.StaticClass;
41 import jdk.dynalink.linker.GuardedInvocation;
42 import jdk.dynalink.linker.GuardingDynamicLinker;
43 import jdk.dynalink.linker.LinkRequest;
44 import jdk.dynalink.linker.LinkerServices;
45 import jdk.dynalink.linker.MethodTypeConversionStrategy;
46 import jdk.dynalink.linker.TypeBasedGuardingDynamicLinker;
47 import jdk.dynalink.linker.support.TypeUtilities;
48 import jdk.nashorn.api.scripting.JSObject;
49 import jdk.nashorn.internal.codegen.CompilerConstants.Call;
50 import jdk.nashorn.internal.lookup.MethodHandleFactory;
51 import jdk.nashorn.internal.lookup.MethodHandleFunctionality;
52 import jdk.nashorn.internal.runtime.Context;
53 import jdk.nashorn.internal.runtime.ECMAException;
54 import jdk.nashorn.internal.runtime.JSType;
55 import jdk.nashorn.internal.runtime.OptimisticReturnFilters;
56 import jdk.nashorn.internal.runtime.ScriptFunction;
57 import jdk.nashorn.internal.runtime.ScriptRuntime;
58
59 /**
60 * This class houses bootstrap method for invokedynamic instructions generated by compiler.
61 */
62 public final class Bootstrap {
63 /** Reference to the seed boostrap function */
64 public static final Call BOOTSTRAP = staticCallNoLookup(Bootstrap.class, "bootstrap", CallSite.class, Lookup.class, String.class, MethodType.class, int.class);
65
66 private static final MethodHandleFunctionality MH = MethodHandleFactory.getFunctionality();
67
68 private static final MethodHandle VOID_TO_OBJECT = MH.constant(Object.class, ScriptRuntime.UNDEFINED);
69
70 private static final BeansLinker beansLinker = new BeansLinker(Bootstrap::createMissingMemberHandler);
71 private static final GuardingDynamicLinker[] prioritizedLinkers;
72 private static final GuardingDynamicLinker[] fallbackLinkers;
73 static {
74 final NashornBeansLinker nashornBeansLinker = new NashornBeansLinker(beansLinker);
75 prioritizedLinkers = new GuardingDynamicLinker[] {
76 new NashornLinker(),
77 new NashornPrimitiveLinker(),
78 new NashornStaticClassLinker(beansLinker),
79 new BoundCallableLinker(),
80 new JavaSuperAdapterLinker(beansLinker),
81 new JSObjectLinker(nashornBeansLinker),
82 new BrowserJSObjectLinker(nashornBeansLinker),
83 new ReflectionCheckLinker()
84 };
85 fallbackLinkers = new GuardingDynamicLinker[] {nashornBeansLinker, new NashornBottomLinker() };
86 }
87
88 // do not create me!!
89 private Bootstrap() {
90 }
91
92 /**
93 * Creates a Nashorn dynamic linker with the given app class loader.
94 * @param appLoader the app class loader. It will be used to discover
95 * additional language runtime linkers (if any).
96 * @param unstableRelinkThreshold the unstable relink threshold
97 * @return a newly created dynamic linker.
98 */
99 public static DynamicLinker createDynamicLinker(final ClassLoader appLoader,
100 final int unstableRelinkThreshold) {
101 final DynamicLinkerFactory factory = new DynamicLinkerFactory();
102 factory.setPrioritizedLinkers(prioritizedLinkers);
103 factory.setFallbackLinkers(fallbackLinkers);
104 factory.setSyncOnRelink(true);
105 factory.setPrelinkTransformer((inv, request, linkerServices) -> {
106 final CallSiteDescriptor desc = request.getCallSiteDescriptor();
107 return OptimisticReturnFilters.filterOptimisticReturnValue(inv, desc).asType(linkerServices, desc.getMethodType());
108 });
109 factory.setAutoConversionStrategy(Bootstrap::unboxReturnType);
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16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.nashorn.internal.runtime.linker;
27
28 import static jdk.nashorn.internal.codegen.CompilerConstants.staticCallNoLookup;
29 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
30
31 import java.lang.invoke.CallSite;
32 import java.lang.invoke.MethodHandle;
33 import java.lang.invoke.MethodHandles;
34 import java.lang.invoke.MethodHandles.Lookup;
35 import java.lang.invoke.MethodType;
36 import java.util.ArrayList;
37 import java.util.Collections;
38 import java.util.List;
39 import jdk.dynalink.CallSiteDescriptor;
40 import jdk.dynalink.DynamicLinker;
41 import jdk.dynalink.DynamicLinkerFactory;
42 import jdk.dynalink.beans.BeansLinker;
43 import jdk.dynalink.beans.StaticClass;
44 import jdk.dynalink.linker.GuardedInvocation;
45 import jdk.dynalink.linker.GuardingDynamicLinker;
46 import jdk.dynalink.linker.LinkRequest;
47 import jdk.dynalink.linker.LinkerServices;
48 import jdk.dynalink.linker.MethodTypeConversionStrategy;
49 import jdk.dynalink.linker.TypeBasedGuardingDynamicLinker;
50 import jdk.dynalink.linker.support.TypeUtilities;
51 import jdk.nashorn.api.scripting.JSObject;
52 import jdk.nashorn.internal.codegen.CompilerConstants.Call;
53 import jdk.nashorn.internal.lookup.MethodHandleFactory;
54 import jdk.nashorn.internal.lookup.MethodHandleFunctionality;
55 import jdk.nashorn.internal.runtime.Context;
56 import jdk.nashorn.internal.runtime.ECMAException;
57 import jdk.nashorn.internal.runtime.JSType;
58 import jdk.nashorn.internal.runtime.OptimisticReturnFilters;
59 import jdk.nashorn.internal.runtime.ScriptFunction;
60 import jdk.nashorn.internal.runtime.ScriptRuntime;
61
62 /**
63 * This class houses bootstrap method for invokedynamic instructions generated by compiler.
64 */
65 public final class Bootstrap {
66 /** Reference to the seed boostrap function */
67 public static final Call BOOTSTRAP = staticCallNoLookup(Bootstrap.class, "bootstrap", CallSite.class, Lookup.class, String.class, MethodType.class, int.class);
68
69 private static final MethodHandleFunctionality MH = MethodHandleFactory.getFunctionality();
70
71 private static final MethodHandle VOID_TO_OBJECT = MH.constant(Object.class, ScriptRuntime.UNDEFINED);
72
73 private static final BeansLinker beansLinker = new BeansLinker(Bootstrap::createMissingMemberHandler);
74 private static final GuardingDynamicLinker[] prioritizedLinkers;
75 private static final GuardingDynamicLinker[] fallbackLinkers;
76
77 static {
78 final NashornBeansLinker nashornBeansLinker = new NashornBeansLinker(beansLinker);
79 prioritizedLinkers = new GuardingDynamicLinker[] {
80 new NashornLinker(),
81 new NashornPrimitiveLinker(),
82 new NashornStaticClassLinker(beansLinker),
83 new BoundCallableLinker(),
84 new JavaSuperAdapterLinker(beansLinker),
85 new JSObjectLinker(nashornBeansLinker),
86 new BrowserJSObjectLinker(nashornBeansLinker),
87 new ReflectionCheckLinker()
88 };
89 fallbackLinkers = new GuardingDynamicLinker[] {nashornBeansLinker, new NashornBottomLinker() };
90 }
91
92 // do not create me!!
93 private Bootstrap() {
94 }
95
96 /**
97 * Returns a list of exposed nashorn dynalink linkers.
98 *
99 * @return a list of exposed nashorn dynalink linkers.
100 */
101 public static List<GuardingDynamicLinker> getExposedLinkers() {
102 // we have to create BeansLinker without nashorn specific missing member handler!
103 // Or else, we'd return values such as 'undefined' to the external world!
104 final NashornBeansLinker nbl = new NashornBeansLinker(new BeansLinker());
105 final JSObjectLinker linker = new JSObjectLinker(nbl);
106 return Collections.singletonList(linker);
107 }
108
109 /**
110 * Creates a Nashorn dynamic linker with the given app class loader.
111 * @param appLoader the app class loader. It will be used to discover
112 * additional language runtime linkers (if any).
113 * @param unstableRelinkThreshold the unstable relink threshold
114 * @return a newly created dynamic linker.
115 */
116 public static DynamicLinker createDynamicLinker(final ClassLoader appLoader,
117 final int unstableRelinkThreshold) {
118 final DynamicLinkerFactory factory = new DynamicLinkerFactory();
119 factory.setPrioritizedLinkers(prioritizedLinkers);
120 factory.setFallbackLinkers(fallbackLinkers);
121 factory.setSyncOnRelink(true);
122 factory.setPrelinkTransformer((inv, request, linkerServices) -> {
123 final CallSiteDescriptor desc = request.getCallSiteDescriptor();
124 return OptimisticReturnFilters.filterOptimisticReturnValue(inv, desc).asType(linkerServices, desc.getMethodType());
125 });
126 factory.setAutoConversionStrategy(Bootstrap::unboxReturnType);
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