1LLVM-CXXMAP(1)                       LLVM                       LLVM-CXXMAP(1)
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NAME

6       llvm-cxxmap - Mangled name remapping tool
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SYNOPSIS

9       llvm-cxxmap [options] symbol-file-1 symbol-file-2
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DESCRIPTION

12       The  llvm-cxxmap  tool  performs  fuzzy  matching of C++ mangled names,
13       based on a file describing name components that  should  be  considered
14       equivalent.
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16       The  symbol  files  should contain a list of C++ mangled names (one per
17       line).  Blank lines and lines starting with # are ignored.  The  output
18       is a list of pairs of equivalent symbols, one per line, of the form
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20          <symbol-1> <symbol-2>
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22       where  <symbol-1>  is  a  symbol from symbol-file-1 and <symbol-2> is a
23       symbol from symbol-file-2. Mappings for which the two symbols are iden‐
24       tical are omitted.
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OPTIONS

27       -remapping-file=file, -r=file
28              Specify  a  file  containing  a  list  of equivalence rules that
29              should be used to determine whether two symbols are  equivalent.
30              Required.  See REMAPPING FILE.
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32       -output=file, -o=file
33              Specify a file to write the list of matched names to. If unspec‐
34              ified, the list will be written to stdout.
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36       -Wambiguous
37              Produce a warning if there are  multiple  equivalent  (but  dis‐
38              tinct) symbols in symbol-file-2.
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40       -Wincomplete
41              Produce  a  warning if symbol-file-1 contains a symbol for which
42              there is no equivalent symbol in symbol-file-2.
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REMAPPING FILE

45       The remapping file is a text file containing lines of the form
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47          fragmentkind fragment1 fragment2
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49       where fragmentkind is  one  of  name,  type,  or  encoding,  indicating
50       whether  the  following mangled name fragments are <name>s, <type>s, or
51       <encoding>s, respectively.  Blank lines and lines starting with  #  are
52       ignored.
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54       Unmangled   C  names  can  be  expressed  as  an  encoding  that  is  a
55       (length-prefixed) <source-name>:
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57          # C function "void foo_bar()" is remapped to C++ function "void foo::bar()".
58          encoding 7foo_bar _Z3foo3barv
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60       For convenience, built-in <substitution>s such as St  and  Ss  are  ac‐
61       cepted as <name>s (even though they technically are not <name>s).
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63       For  example,  to  specify  that absl::string_view and std::string_view
64       should be treated as equivalent, the following remapping file could  be
65       used:
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67          # absl::string_view is considered equivalent to std::string_view
68          type N4absl11string_viewE St17basic_string_viewIcSt11char_traitsIcEE
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70          # std:: might be std::__1:: in libc++ or std::__cxx11:: in libstdc++
71          name St St3__1
72          name St St7__cxx11
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74       NOTE:
75          Symbol  remapping  is currently only supported for C++ mangled names
76          following the Itanium C++ ABI mangling scheme. This covers  all  C++
77          targets supported by Clang other than Windows targets.
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AUTHOR

80       Maintained by the LLVM Team (https://llvm.org/).
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83       2003-2021, LLVM Project
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8810                                2021-07-22                    LLVM-CXXMAP(1)
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