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8168774: Polymorhic signature method check crashes javac

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Check for polysig method assumes arity is greater than zero

Reviewed-by: vromero
This commit is contained in:
Maurizio Cimadamore 2016-10-26 15:41:25 +01:00
parent 47f7c2e668
commit 12e8fccd6c
2 changed files with 13 additions and 1 deletions
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2
langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Types.java
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@ -1004,7 +1004,7 @@ public class Types {
List<Type> argtypes = msym.type.getParameterTypes(); List<Type> argtypes = msym.type.getParameterTypes();
return (msym.flags_field & NATIVE) != 0 && return (msym.flags_field & NATIVE) != 0 &&
(msym.owner == syms.methodHandleType.tsym || msym.owner == syms.varHandleType.tsym) && (msym.owner == syms.methodHandleType.tsym || msym.owner == syms.varHandleType.tsym) &&
argtypes.tail.tail == null && argtypes.length() == 1 &&
argtypes.head.hasTag(TypeTag.ARRAY) && argtypes.head.hasTag(TypeTag.ARRAY) &&
((ArrayType)argtypes.head).elemtype.tsym == syms.objectType.tsym; ((ArrayType)argtypes.head).elemtype.tsym == syms.objectType.tsym;
} }

12
langtools/test/tools/javac/meth/BadPolySig.java Normal file
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@ -0,0 +1,12 @@
/*
* @test
* @bug 8168774
* @summary Polymorhic signature method check crashes javac
* @compile -Xmodule:java.base BadPolySig.java
*/
package java.lang.invoke;
class MethodHandle {
native Object m();
}