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GNU/Linux |
CentOS 2.1AS(Slurm) |
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c++filt(1) |
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cxxfilt − Demangle C ++ and Java symbols.
c++filt [ −_ ⎪ −−strip-underscores ]
[ −s format
⎪ −−format=format ]
[ −−help ] [ −−version ] [
symbol... ]
The C ++ and Java languages provides function overloading, which means that you can write many functions with the same name (providing each takes parameters of different types). All C ++ and Java function names are encoded into a low-level assembly label (this process is known as mangling). The "c++filt" [1] program does the inverse mapping: it decodes (demangles) low-level names into user-level names so that the linker can keep these overloaded functions from clashing.
Every alphanumeric word (consisting of letters, digits, underscores, dollars, or periods) seen in the input is a potential label. If the label decodes into a C ++ name, the C ++ name replaces the low-level name in the output.
You can use "c++filt" to decipher individual symbols:
c++filt I<symbol>
If no symbol arguments are given, "c++filt" reads symbol names from the standard input and writes the demangled names to the standard output. All results are printed on the standard output.
""−_""
""−−strip−underscores""
On some systems, both the C and C ++ compilers put an underscore in front of every name. For example, the C name "foo" gets the low-level name "_foo". This option removes the initial underscore. Whether "c++filt" removes the underscore by default is target dependent.
""−j""
""−−java""
Prints demangled names using Java syntax. The default is to use C ++ syntax.
""−n""
""−−no−strip−underscores""
Do not remove the initial underscore.
""−s
format""
""−−format=format""
GNU
"nm" can decode three different methods
of mangling, used by different C ++
compilers. The argument to this option selects which method
it uses:
""gnu""
the one used by the GNU compiler (the default method)
""lucid""
the one used by the Lucid compiler
""arm""
the one specified by the C ++ Annotated Reference Manual
""hp""
the one used by the HP compiler
""edg""
the one used by the EDG compiler
""gnu−new−abi""
the one used by the GNU compiler with the new ABI .
""−−help""
Print a summary of the options to "c++filt" and exit.
""−−version""
Print the version number of "c++filt" and exit.
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1. |
MS-DOS does not allow "+" characters in file names, so on MS-DOS this program is named "cxxfilt". |
the Info entries for binutils.
Copyright (c) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled " GNU Free Documentation License".
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c++filt(1) | |