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GNU/Linux |
RedHat 9.0(Shrike) |
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c++filt(1) |
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c++filt − Demangle C++ and Java symbols.
c++filt
[−_⎪−−strip−underscores]
[−j⎪−−java]
[−n⎪−−no−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 <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.
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−_ |
−−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.
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−j |
−−java
Prints demangled names using Java syntax. The default is to use C ++ syntax.
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−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−v3"
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 c++filt. |
the Info entries for binutils.
Copyright (c) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002 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) | |