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8203886: Invoke LambdaMetafactory::altMetafactory exactly from the BootstrapMethodInvoker

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Reviewed-by: mchung
This commit is contained in:
Claes Redestad 2018-05-30 14:46:28 +02:00
parent ff2c3d4dbe
commit b67da0de17
1 changed files with 14 additions and 0 deletions
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14
src/java.base/share/classes/java/lang/invoke/BootstrapMethodInvoker.java
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@ -134,6 +134,8 @@ final class BootstrapMethodInvoker {
String recipe = (String)argv[0];
Object[] shiftedArgs = Arrays.copyOfRange(argv, 1, argv.length);
result = (CallSite)bootstrapMethod.invokeExact(caller, name, (MethodType)type, recipe, shiftedArgs);
} else if (isLambdaMetafactoryAltMetafactoryBSM(bsmType)) {
result = (CallSite)bootstrapMethod.invokeExact(caller, name, (MethodType)type, argv);
} else {
switch (argv.length) {
case 0:
@ -286,6 +288,9 @@ final class BootstrapMethodInvoker {
private static final MethodType LMF_INDY_MT = MethodType.methodType(CallSite.class,
Lookup.class, String.class, MethodType.class, MethodType.class, MethodHandle.class, MethodType.class);
private static final MethodType LMF_ALT_MT = MethodType.methodType(CallSite.class,
Lookup.class, String.class, MethodType.class, Object[].class);
private static final MethodType LMF_CONDY_MT = MethodType.methodType(Object.class,
Lookup.class, String.class, Class.class, MethodType.class, MethodHandle.class, MethodType.class);
@ -319,6 +324,15 @@ final class BootstrapMethodInvoker {
return bsmType == LMF_INDY_MT;
}
/**
* @return true iff the BSM method type exactly matches
* {@see java.lang.invoke.LambdaMetafactory#altMetafactory(
* MethodHandles.Lookup,String,MethodType,Object[])}
*/
private static boolean isLambdaMetafactoryAltMetafactoryBSM(MethodType bsmType) {
return bsmType == LMF_ALT_MT;
}
/** The JVM produces java.lang.Integer values to box
* CONSTANT_Integer boxes but does not intern them.
* Let's intern them. This is slightly wrong for