RFR: 8087223: InterfaceMethod CP entry pointing to a class should cause ICCE (original) (raw)

Yumin Qi yumin.qi at oracle.com
Thu Nov 12 20:54:42 UTC 2015

Please review:

bug: https://bugs.openjdk.java.net/browse/JDK-8087223 webrev: http://javaweb.us.oracle.com/~yqi/webrev/webrevs/8087223/8087223/webrev-01/

According to JVMS-8:

JVMS-5.4.3.3 Method Resolution: " If C is an interface, method resolution throws an IncompatibleClassChangeError." JVMS-5.4.3.4 Interface Method Resolution: "If C is not an interface, interface method resolution throws an IncompatibleClassChangeError"

When invoke a method with resolved to an interface method, or invoke a interface method with resolved to an instance method, ICCE should be thrown. The case usually happens when using tools like asmtools or jdk.internal.org.objectweb.asm to generate java bytecode.

The fix is carrying the constantTag for the method at call and check if tag is consistent with the method called. Doing this by adding a member of constantTag, _tag, to LinkInfo, and check tag in resolve functions to see if tag matched with the correct method.

The fix solved the problem when call is from interpreter and compiler, bug for MethodHandle invoke, which should be addressed in another bug,
since the MethodHandle does not come with a byte stream and getting the constant pool index at the invoke is not possible. It will be addressed in another bug.

Tests: test case (added, minor modified from bug), JPRT, rutime quick test list(in progress). manually tested: 1) -Xint 2) -Xcomp 3) -Xcomp -XX:-TieredCompiltion 4) -Xcomp -XX:+TieredCompilation

Thanks to Coleen for helping fixed constant pool index and cleaned LinkInfo.

Thanks Yumin

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