archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-27 06:45:07 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

6610906: inexplicable IncompatibleClassChangeError

Browse source 
Dependency check must treat polymorphic interfaces consistently

Reviewed-by: kvn, never, sgoldman
This commit is contained in:
John R Rose 2008-02-27 00:23:37 -08:00
parent 9f1a8ede80
commit 73fa03eafc
2 changed files with 9 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

8
hotspot/src/share/vm/code/dependencies.cpp
View file

@ -882,6 +882,14 @@ klassOop ClassHierarchyWalker::find_witness_in(DepChange& changes,
// Must not move the class hierarchy during this check:
assert_locked_or_safepoint(Compile_lock);
int nof_impls = instanceKlass::cast(context_type)->nof_implementors();
if (nof_impls > 1) {
// Avoid this case: *I.m > { A.m, C }; B.m > C
// %%% Until this is fixed more systematically, bail out.
// See corresponding comment in find_witness_anywhere.
return context_type;
}
assert(!is_participant(new_type), "only old classes are participants");
if (participants_hide_witnesses) {
// If the new type is a subtype of a participant, we are done.