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The overloaded assignment operator previously only deleted the head
``UpdateNode`` if the ``UpdateList`` had exclusive ownership which left the remaining
list of ``UpdateNode``s dangling if those nodes had ``refCount`` of 1.
To fix this the logic that was previously in the ``UpdateList`` destructor
for deleting nodes that were exclusively referenced by the UpdateList
has been moved into ``UpdateList::tryFreeNodes()`` so that it can be
called from ``UpdateList::operator=()``.
It looks like this bug has been in KLEE since the beginning.
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lists can have NULL roots, e.g. in MemoryObject instances with concrete
contents, where root is allocated lazily only when the updates are required).
Also checking whether array updates are typed correctly in UpdateList::extend()
rather than in the constructor of UpdateNode (only for update lists with
non-NULL roots).
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arrays from the Array and UpdateNode classes.
git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@166214 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@73128 91177308-0d34-0410-b5e6-96231b3b80d8
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- The right way to handle this is by using constant arrays, where the semantics
are easier to define and implement.
git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@73124 91177308-0d34-0410-b5e6-96231b3b80d8
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more standard reference counting wrapper.
- The only interesting changes here are in Ref.h, everything else is just
updating foo.method to use foo->method instead.
git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@72777 91177308-0d34-0410-b5e6-96231b3b80d8
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- Lots more tweaks, documentation, and web page content is needed,
but this should compile & work on OS X & Linux.
git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@72205 91177308-0d34-0410-b5e6-96231b3b80d8
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