This is a pretty large refactor / re-write of the Microsoft
demangler. The previous one was a little hackish because it
evolved as I was learning about all the various edge cases,
exceptions, etc. It didn't have a proper AST and so there was
lots of custom handling of things that should have been much
more clean.
Taking what was learned from that experience, it's now
re-written with a completely redesigned and much more sensible
AST. It's probably still not perfect, but at least it's
comprehensible now to someone else who wants to come along
and make some modifications or read the code.
Incidentally, this fixed a couple of bugs, so I've enabled
the tests which now pass.
llvm-svn: 340710
I found these by running llvm-undname over a couple hundred
megabytes of object files generated as part of building chromium.
The issues fixed in this patch are:
1) decltype-auto return types.
2) Indirect vtables (e.g. const A::`vftable'{for `B'})
3) Pointers, references, and rvalue-references to member pointers.
I have exactly one remaining symbol out of a few hundred MB of object
files that produces a name we can't demangle, and it's related to
back-referencing.
llvm-svn: 340341
This is encoded as __E and should print something like
"dynamic initializer for 'Foo'(void)"
This also adds support for dynamic atexit destructor, which is
basically identical but encoded as __F with slightly different
description.
llvm-svn: 340239
We were only printing the vtordisp thunk before as the previous
patch was more aimed at getting special operators working, one
of which was a thunk. This patch gets all thunk types to print
properly, and adds a test for each one.
llvm-svn: 340088
Previously, some of the code for actually parsing mangled
operator names was more like formatting code in nature,
and was interspersed with the demangling code which builds
the AST. This means that by the time we got to the printing
code, we had lost all information about what type of operator
we had, and all we were left with was a string that we just
had to print. However, not all operators are actually even
operators. it's basically just a catch-all mangling for
"special names", and for some of the other types it helps
to know when we're actually doing the printing what it is.
This patch changes the way things work by introducing an
OperatorInfo structure and corresponding enumeration. When
we demangle we store the enumeration value and demangled
components separately. This gives more flexibility during
printing.
In doing so, some demanglings of special names which we didn't
previously support come out of this for free, so we now demangle
those.
A few are more complex and are better left for a followup patch
though.
An exhaustive test of every possible operator code is included,
with the ones that don't yet work commented out.
llvm-svn: 340046
Zachary Turner