Red Hat ENTERPRISE LINUX 4 - USING BINUTILS Bedienungsanleitung PDF herunterladen (Seite 43)

Chapter 10.

c++ﬁlt

c++filt [-_|--strip-underscores]

[-j|--java]

[-n|--no-strip-underscores]

[-p|--no-params]

[-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

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.

-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.

-p

-no-params

When demangling the name of a function, do not display the types of the function’s parameters.

1. MS-DOS does not allow + characters in ﬁle names, so on MS-DOS this program is named cxxfilt.

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Red Hat ENTERPRISE LINUX 4 - USING BINUTILS Bedienungsanleitung Seite 43