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#513 Abstract interface method compilation failure
The Compiler framework
(vm/compilers/baseline/VM_CompilerFramework.java)
implicitly assumes that an invokevirtual on method M in
class C will resolve to a method in C or a superclass,
consistent with the recursive resolution algorithm
specified by JVM spec 5.4.3.3.
This assumption, as manifest in
VM_CompilerFramework.genCode(), is incorrect in cases
which satisfy all of the following conditions hold true:
(a) C is abstract
(b) M is defined by an interface or superinterface of C
(c) M is invokevirtual [rather than invokeinterface]
through C
(d) M is not explicitly defined as abstract in C
Cases which satisfy all the above conditions result in
the following exception being raised at compilation
runtime:
Exception in thread "main":
java.lang.NoSuchMethodError: < SystemAppCL,
LAbstractClass;, someMethod, (Ljava/lang/Object;I)V >
at
com.ibm.JikesRVM.classloader.VM_MethodReference.resolveInternal(VM_MethodReference.java:231)
at
com.ibm.JikesRVM.classloader.VM_MethodReference.peekResolvedMethod(VM_MethodReference.java:173)
at
com.ibm.JikesRVM.classloader.VM_MemberReference.peekResolvedMember(VM_MemberReference.java:227)
at
com.ibm.JikesRVM.classloader.VM_MemberReference.needsDynamicLink(VM_MemberReference.java:249)
at
com.ibm.JikesRVM.VM_CompilerFramework.genCode(VM_CompilerFramework.java:1438)
at
com.ibm.JikesRVM.VM_BaselineCompiler.compile(VM_BaselineCompiler.java:214)
at
com.ibm.JikesRVM.VM_BaselineCompiler.compile(VM_BaselineCompiler.java:159)
at
com.ibm.JikesRVM.VM_RuntimeCompiler.baselineCompile(VM_RuntimeCompiler.java:319)
at
com.ibm.JikesRVM.VM_RuntimeCompiler.compile(VM_RuntimeCompiler.java:843)
at
com.ibm.JikesRVM.classloader.VM_NormalMethod.genCode(VM_NormalMethod.java:176)
at
com.ibm.JikesRVM.classloader.VM_Method.compile(VM_Method.java:399)
at
com.ibm.JikesRVM.VM_DynamicLinker$DL_Helper.compileMethod(VM_DynamicLinker.java:124)
at
com.ibm.JikesRVM.VM_DynamicLinker.lazyMethodInvoker(VM_DynamicLinker.java:31)
at Test.testSomeClass(Test.java:19)
at Test.main(Test.java:13)
A test case demonstrating this bug will be added to
rvm/regression/tests/bytecodeTests.
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I can confirm we differ from Sun's JVM with this case.
Ian
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From conversation on the Classpath IRC with Tom Tromey and
Mark Weilaard, apparently this issue is likely to be related
to the Jikes RVM's handling of Miranda methods. Google
provides the source of a few links, but there's also some
discussion here:
http://lists.nongnu.org/archive/html/classpath/2003-03/msg00002.html
Ian
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applied patch 1483900 which fixes this defect.
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patch only fixed IA32 baseline compiler; working on
comprable fixes for PPC and opt compilers.
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fix for PPC compiler committed; fix for opt compiler will be
committed shortly.