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11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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13  * accompanied this code).
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23 
24 
25 package org.graalvm.compiler.hotspot;
26 
27 import org.graalvm.compiler.serviceprovider.ServiceProvider;
28 
29 import jdk.vm.ci.common.NativeImageReinitialize;
30 import jdk.vm.ci.hotspot.HotSpotVMEventListener;
31 import jdk.vm.ci.runtime.JVMCICompilerFactory;
32 import jdk.vm.ci.services.JVMCIServiceLocator;
33 
34 @ServiceProvider(JVMCIServiceLocator.class)
35 public final class HotSpotGraalJVMCIServiceLocator extends JVMCIServiceLocator {
36 
37     /**
38      * Holds the state shared between all {@link HotSpotGraalJVMCIServiceLocator} instances. This is
39      * necessary as a service provider instance is created each time the service is loaded.
40      */
41     private static final class Shared {
42         static final Shared SINGLETON = new Shared();
43 
getProvider(Class<T> service, HotSpotGraalJVMCIServiceLocator locator)44         <T> T getProvider(Class<T> service, HotSpotGraalJVMCIServiceLocator locator) {
45             if (service == JVMCICompilerFactory.class) {
46                 return service.cast(new HotSpotGraalCompilerFactory(locator));
47             } else if (service == HotSpotVMEventListener.class) {
48                 if (graalRuntime != null) {
49                     return service.cast(new HotSpotGraalVMEventListener(graalRuntime));
50                 }
51             }
52             return null;
53         }
54 
55         @NativeImageReinitialize private HotSpotGraalRuntime graalRuntime;
56 
57         /**
58          * Notifies this object of the compiler created via {@link HotSpotGraalJVMCIServiceLocator}.
59          */
onCompilerCreation(HotSpotGraalCompiler compiler)60         void onCompilerCreation(HotSpotGraalCompiler compiler) {
61             assert this.graalRuntime == null : "only expect a single JVMCICompiler to be created";
62             this.graalRuntime = (HotSpotGraalRuntime) compiler.getGraalRuntime();
63         }
64     }
65 
66     @Override
getProvider(Class<T> service)67     public <T> T getProvider(Class<T> service) {
68         return Shared.SINGLETON.getProvider(service, this);
69     }
70 
71     /**
72      * Notifies this object of the compiler created via {@link HotSpotGraalJVMCIServiceLocator}.
73      */
74     @SuppressWarnings("static-method")
onCompilerCreation(HotSpotGraalCompiler compiler)75     void onCompilerCreation(HotSpotGraalCompiler compiler) {
76         Shared.SINGLETON.onCompilerCreation(compiler);
77     }
78 }
79