LLVM-CXXMAP(1) LLVM LLVM-CXXMAP(1)
NAME
llvm-cxxmap - Mangled name remapping tool
SYNOPSIS
llvm-cxxmap [options] symbol-file-1 symbol-file-2
DESCRIPTION
The llvm-cxxmap tool performs fuzzy matching of C++ mangled names,
based on a file describing name components that should be considered
equivalent.
The symbol files should contain a list of C++ mangled names (one per
line). Blank lines and lines starting with # are ignored. The output
is a list of pairs of equivalent symbols, one per line, of the form
<symbol-1> <symbol-2>
where <symbol-1> is a symbol from symbol-file-1 and <symbol-2> is a
symbol from symbol-file-2. Mappings for which the two symbols are iden-
tical are omitted.
OPTIONS
-remapping-file=file, -r=file
Specify a file containing a list of equivalence rules that
should be used to determine whether two symbols are equivalent.
Required. See REMAPPING FILE.
-output=file, -o=file
Specify a file to write the list of matched names to. If unspec-
ified, the list will be written to stdout.
-Wambiguous
Produce a warning if there are multiple equivalent (but dis-
tinct) symbols in symbol-file-2.
-Wincomplete
Produce a warning if symbol-file-1 contains a symbol for which
there is no equivalent symbol in symbol-file-2.
REMAPPING FILE
The remapping file is a text file containing lines of the form
fragmentkind fragment1 fragment2
where fragmentkind is one of name, type, or encoding, indicating
whether the following mangled name fragments are <name>s, <type>s, or
<encoding>s, respectively. Blank lines and lines starting with # are
ignored.
Unmangled C names can be expressed as an encoding that is a
(length-prefixed) <source-name>:
# C function "void foo_bar()" is remapped to C++ function "void foo::bar()".
encoding 7foo_bar _Z3foo3barv
For convenience, built-in <substitution>s such as St and Ss are ac-
cepted as <name>s (even though they technically are not <name>s).
For example, to specify that absl::string_view and std::string_view
should be treated as equivalent, the following remapping file could be
used:
# absl::string_view is considered equivalent to std::string_view
type N4absl11string_viewE St17basic_string_viewIcSt11char_traitsIcEE
# std:: might be std::__1:: in libc++ or std::__cxx11:: in libstdc++
name St St3__1
name St St7__cxx11
NOTE:
Symbol remapping is currently only supported for C++ mangled names
following the Itanium C++ ABI mangling scheme. This covers all C++
targets supported by Clang other than Windows targets.
AUTHOR
Maintained by the LLVM Team (https://llvm.org/).
COPYRIGHT
2003-2023, LLVM Project
15 2023-10-16 LLVM-CXXMAP(1)
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