1 llvm-cxxmap - Mangled name remapping tool
2 =========================================
7 :program:`llvm-cxxmap` [*options*] *symbol-file-1* *symbol-file-2*
12 The :program:`llvm-cxxmap` tool performs fuzzy matching of C++ mangled names,
13 based on a file describing name components that should be considered equivalent.
15 The symbol files should contain a list of C++ mangled names (one per line).
16 Blank lines and lines starting with ``#`` are ignored. The output is a list
17 of pairs of equivalent symbols, one per line, of the form
23 where ``<symbol-1>`` is a symbol from *symbol-file-1* and ``<symbol-2>`` is
24 a symbol from *symbol-file-2*. Mappings for which the two symbols are identical
30 .. program:: llvm-cxxmap
32 .. option:: -remapping-file=file, -r=file
34 Specify a file containing a list of equivalence rules that should be used
35 to determine whether two symbols are equivalent. Required.
36 See :ref:`remapping-file`.
38 .. option:: -output=file, -o=file
40 Specify a file to write the list of matched names to. If unspecified, the
41 list will be written to stdout.
43 .. option:: -Wambiguous
45 Produce a warning if there are multiple equivalent (but distinct) symbols in
48 .. option:: -Wincomplete
50 Produce a warning if *symbol-file-1* contains a symbol for which there is no
51 equivalent symbol in *symbol-file-2*.
58 The remapping file is a text file containing lines of the form
62 fragmentkind fragment1 fragment2
64 where ``fragmentkind`` is one of ``name``, ``type``, or ``encoding``,
65 indicating whether the following mangled name fragments are
66 <`name <http://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangle.name>`_>s,
67 <`type <http://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangle.type>`_>s, or
68 <`encoding <http://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangle.encoding>`_>s,
70 Blank lines and lines starting with ``#`` are ignored.
72 For convenience, built-in <substitution>s such as ``St`` and ``Ss``
73 are accepted as <name>s (even though they technically are not <name>s).
75 For example, to specify that ``absl::string_view`` and ``std::string_view``
76 should be treated as equivalent, the following remapping file could be used:
80 # absl::string_view is considered equivalent to std::string_view
81 type N4absl11string_viewE St17basic_string_viewIcSt11char_traitsIcEE
83 # std:: might be std::__1:: in libc++ or std::__cxx11:: in libstdc++
89 Symbol remapping is currently only supported for C++ mangled names
90 following the Itanium C++ ABI mangling scheme. This covers all C++ targets
91 supported by Clang other than Windows targets.