377 lines
12 KiB
Groff
377 lines
12 KiB
Groff
|
.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
|
||
|
|
.\"
|
||
|
|
.\" Standard preamble:
|
||
|
|
.\" ========================================================================
|
||
|
|
.de Sp \" Vertical space (when we can't use .PP)
|
||
|
|
.if t .sp .5v
|
||
|
|
.if n .sp
|
||
|
|
..
|
||
|
|
.de Vb \" Begin verbatim text
|
||
|
|
.ft CW
|
||
|
|
.nf
|
||
|
|
.ne \\$1
|
||
|
|
..
|
||
|
|
.de Ve \" End verbatim text
|
||
|
|
.ft R
|
||
|
|
.fi
|
||
|
|
..
|
||
|
|
.\" Set up some character translations and predefined strings. \*(-- will
|
||
|
|
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
|
||
|
|
.\" double quote, and \*(R" will give a right double quote. \*(C+ will
|
||
|
|
.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
|
||
|
|
.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
|
||
|
|
.\" nothing in troff, for use with C<>.
|
||
|
|
.tr \(*W-
|
||
|
|
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
|
||
|
|
.ie n \{\
|
||
|
|
. ds -- \(*W-
|
||
|
|
. ds PI pi
|
||
|
|
. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
|
||
|
|
. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
|
||
|
|
. ds L" ""
|
||
|
|
. ds R" ""
|
||
|
|
. ds C` ""
|
||
|
|
. ds C' ""
|
||
|
|
'br\}
|
||
|
|
.el\{\
|
||
|
|
. ds -- \|\(em\|
|
||
|
|
. ds PI \(*p
|
||
|
|
. ds L" ``
|
||
|
|
. ds R" ''
|
||
|
|
. ds C`
|
||
|
|
. ds C'
|
||
|
|
'br\}
|
||
|
|
.\"
|
||
|
|
.\" Escape single quotes in literal strings from groff's Unicode transform.
|
||
|
|
.ie \n(.g .ds Aq \(aq
|
||
|
|
.el .ds Aq '
|
||
|
|
.\"
|
||
|
|
.\" If the F register is >0, we'll generate index entries on stderr for
|
||
|
|
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
|
||
|
|
.\" entries marked with X<> in POD. Of course, you'll have to process the
|
||
|
|
.\" output yourself in some meaningful fashion.
|
||
|
|
.\"
|
||
|
|
.\" Avoid warning from groff about undefined register 'F'.
|
||
|
|
.de IX
|
||
|
|
..
|
||
|
|
.nr rF 0
|
||
|
|
.if \n(.g .if rF .nr rF 1
|
||
|
|
.if (\n(rF:(\n(.g==0)) \{\
|
||
|
|
. if \nF \{\
|
||
|
|
. de IX
|
||
|
|
. tm Index:\\$1\t\\n%\t"\\$2"
|
||
|
|
..
|
||
|
|
. if !\nF==2 \{\
|
||
|
|
. nr % 0
|
||
|
|
. nr F 2
|
||
|
|
. \}
|
||
|
|
. \}
|
||
|
|
.\}
|
||
|
|
.rr rF
|
||
|
|
.\"
|
||
|
|
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
|
||
|
|
.\" Fear. Run. Save yourself. No user-serviceable parts.
|
||
|
|
. \" fudge factors for nroff and troff
|
||
|
|
.if n \{\
|
||
|
|
. ds #H 0
|
||
|
|
. ds #V .8m
|
||
|
|
. ds #F .3m
|
||
|
|
. ds #[ \f1
|
||
|
|
. ds #] \fP
|
||
|
|
.\}
|
||
|
|
.if t \{\
|
||
|
|
. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
|
||
|
|
. ds #V .6m
|
||
|
|
. ds #F 0
|
||
|
|
. ds #[ \&
|
||
|
|
. ds #] \&
|
||
|
|
.\}
|
||
|
|
. \" simple accents for nroff and troff
|
||
|
|
.if n \{\
|
||
|
|
. ds ' \&
|
||
|
|
. ds ` \&
|
||
|
|
. ds ^ \&
|
||
|
|
. ds , \&
|
||
|
|
. ds ~ ~
|
||
|
|
. ds /
|
||
|
|
.\}
|
||
|
|
.if t \{\
|
||
|
|
. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
|
||
|
|
. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
|
||
|
|
. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
|
||
|
|
. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
|
||
|
|
. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
|
||
|
|
. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
|
||
|
|
.\}
|
||
|
|
. \" troff and (daisy-wheel) nroff accents
|
||
|
|
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
|
||
|
|
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
|
||
|
|
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
|
||
|
|
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
|
||
|
|
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
|
||
|
|
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
|
||
|
|
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
|
||
|
|
.ds ae a\h'-(\w'a'u*4/10)'e
|
||
|
|
.ds Ae A\h'-(\w'A'u*4/10)'E
|
||
|
|
. \" corrections for vroff
|
||
|
|
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
|
||
|
|
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
|
||
|
|
. \" for low resolution devices (crt and lpr)
|
||
|
|
.if \n(.H>23 .if \n(.V>19 \
|
||
|
|
\{\
|
||
|
|
. ds : e
|
||
|
|
. ds 8 ss
|
||
|
|
. ds o a
|
||
|
|
. ds d- d\h'-1'\(ga
|
||
|
|
. ds D- D\h'-1'\(hy
|
||
|
|
. ds th \o'bp'
|
||
|
|
. ds Th \o'LP'
|
||
|
|
. ds ae ae
|
||
|
|
. ds Ae AE
|
||
|
|
.\}
|
||
|
|
.rm #[ #] #H #V #F C
|
||
|
|
.\" ========================================================================
|
||
|
|
.\"
|
||
|
|
.IX Title "C++FILT 1"
|
||
|
|
.TH C++FILT 1 "2023-02-11" "binutils-2.39" "GNU Development Tools"
|
||
|
|
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
|
||
|
|
.\" way too many mistakes in technical documents.
|
||
|
|
.if n .ad l
|
||
|
|
.nh
|
||
|
|
.SH "NAME"
|
||
|
|
c++filt \- demangle C++ and Java symbols
|
||
|
|
.SH "SYNOPSIS"
|
||
|
|
.IX Header "SYNOPSIS"
|
||
|
|
c++filt [\fB\-_\fR|\fB\-\-strip\-underscore\fR]
|
||
|
|
[\fB\-n\fR|\fB\-\-no\-strip\-underscore\fR]
|
||
|
|
[\fB\-p\fR|\fB\-\-no\-params\fR]
|
||
|
|
[\fB\-t\fR|\fB\-\-types\fR]
|
||
|
|
[\fB\-i\fR|\fB\-\-no\-verbose\fR]
|
||
|
|
[\fB\-r\fR|\fB\-\-no\-recurse\-limit\fR]
|
||
|
|
[\fB\-R\fR|\fB\-\-recurse\-limit\fR]
|
||
|
|
[\fB\-s\fR \fIformat\fR|\fB\-\-format=\fR\fIformat\fR]
|
||
|
|
[\fB\-\-help\fR] [\fB\-\-version\fR] [\fIsymbol\fR...]
|
||
|
|
.SH "DESCRIPTION"
|
||
|
|
.IX Header "DESCRIPTION"
|
||
|
|
The \*(C+ and Java languages provide function overloading, which means
|
||
|
|
that you can write many functions with the same name, providing that
|
||
|
|
each function takes parameters of different types. In order to be
|
||
|
|
able to distinguish these similarly named functions \*(C+ and Java
|
||
|
|
encode them into a low-level assembler name which uniquely identifies
|
||
|
|
each different version. This process is known as \fImangling\fR. The
|
||
|
|
\&\fBc++filt\fR
|
||
|
|
[1]
|
||
|
|
program does the inverse mapping: it decodes (\fIdemangles\fR) low-level
|
||
|
|
names into user-level names so that they can be read.
|
||
|
|
.PP
|
||
|
|
Every alphanumeric word (consisting of letters, digits, underscores,
|
||
|
|
dollars, or periods) seen in the input is a potential mangled name.
|
||
|
|
If the name decodes into a \*(C+ name, the \*(C+ name replaces the
|
||
|
|
low-level name in the output, otherwise the original word is output.
|
||
|
|
In this way you can pass an entire assembler source file, containing
|
||
|
|
mangled names, through \fBc++filt\fR and see the same source file
|
||
|
|
containing demangled names.
|
||
|
|
.PP
|
||
|
|
You can also use \fBc++filt\fR to decipher individual symbols by
|
||
|
|
passing them on the command line:
|
||
|
|
.PP
|
||
|
|
.Vb 1
|
||
|
|
\& c++filt <symbol>
|
||
|
|
.Ve
|
||
|
|
.PP
|
||
|
|
If no \fIsymbol\fR arguments are given, \fBc++filt\fR reads symbol
|
||
|
|
names from the standard input instead. All the results are printed on
|
||
|
|
the standard output. The difference between reading names from the
|
||
|
|
command line versus reading names from the standard input is that
|
||
|
|
command-line arguments are expected to be just mangled names and no
|
||
|
|
checking is performed to separate them from surrounding text. Thus
|
||
|
|
for example:
|
||
|
|
.PP
|
||
|
|
.Vb 1
|
||
|
|
\& c++filt \-n _Z1fv
|
||
|
|
.Ve
|
||
|
|
.PP
|
||
|
|
will work and demangle the name to \*(L"f()\*(R" whereas:
|
||
|
|
.PP
|
||
|
|
.Vb 1
|
||
|
|
\& c++filt \-n _Z1fv,
|
||
|
|
.Ve
|
||
|
|
.PP
|
||
|
|
will not work. (Note the extra comma at the end of the mangled
|
||
|
|
name which makes it invalid). This command however will work:
|
||
|
|
.PP
|
||
|
|
.Vb 1
|
||
|
|
\& echo _Z1fv, | c++filt \-n
|
||
|
|
.Ve
|
||
|
|
.PP
|
||
|
|
and will display \*(L"f(),\*(R", i.e., the demangled name followed by a
|
||
|
|
trailing comma. This behaviour is because when the names are read
|
||
|
|
from the standard input it is expected that they might be part of an
|
||
|
|
assembler source file where there might be extra, extraneous
|
||
|
|
characters trailing after a mangled name. For example:
|
||
|
|
.PP
|
||
|
|
.Vb 1
|
||
|
|
\& .type _Z1fv, @function
|
||
|
|
.Ve
|
||
|
|
.SH "OPTIONS"
|
||
|
|
.IX Header "OPTIONS"
|
||
|
|
.IP "\fB\-_\fR" 4
|
||
|
|
.IX Item "-_"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-strip\-underscore\fR" 4
|
||
|
|
.IX Item "--strip-underscore"
|
||
|
|
.PD
|
||
|
|
On some systems, both the C and \*(C+ compilers put an underscore in front
|
||
|
|
of every name. For example, the C name \f(CW\*(C`foo\*(C'\fR gets the low-level
|
||
|
|
name \f(CW\*(C`_foo\*(C'\fR. This option removes the initial underscore. Whether
|
||
|
|
\&\fBc++filt\fR removes the underscore by default is target dependent.
|
||
|
|
.IP "\fB\-n\fR" 4
|
||
|
|
.IX Item "-n"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-no\-strip\-underscore\fR" 4
|
||
|
|
.IX Item "--no-strip-underscore"
|
||
|
|
.PD
|
||
|
|
Do not remove the initial underscore.
|
||
|
|
.IP "\fB\-p\fR" 4
|
||
|
|
.IX Item "-p"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-no\-params\fR" 4
|
||
|
|
.IX Item "--no-params"
|
||
|
|
.PD
|
||
|
|
When demangling the name of a function, do not display the types of
|
||
|
|
the function's parameters.
|
||
|
|
.IP "\fB\-t\fR" 4
|
||
|
|
.IX Item "-t"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-types\fR" 4
|
||
|
|
.IX Item "--types"
|
||
|
|
.PD
|
||
|
|
Attempt to demangle types as well as function names. This is disabled
|
||
|
|
by default since mangled types are normally only used internally in
|
||
|
|
the compiler, and they can be confused with non-mangled names. For example,
|
||
|
|
a function called \*(L"a\*(R" treated as a mangled type name would be
|
||
|
|
demangled to \*(L"signed char\*(R".
|
||
|
|
.IP "\fB\-i\fR" 4
|
||
|
|
.IX Item "-i"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-no\-verbose\fR" 4
|
||
|
|
.IX Item "--no-verbose"
|
||
|
|
.PD
|
||
|
|
Do not include implementation details (if any) in the demangled
|
||
|
|
output.
|
||
|
|
.IP "\fB\-r\fR" 4
|
||
|
|
.IX Item "-r"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-R\fR" 4
|
||
|
|
.IX Item "-R"
|
||
|
|
.IP "\fB\-\-recurse\-limit\fR" 4
|
||
|
|
.IX Item "--recurse-limit"
|
||
|
|
.IP "\fB\-\-no\-recurse\-limit\fR" 4
|
||
|
|
.IX Item "--no-recurse-limit"
|
||
|
|
.IP "\fB\-\-recursion\-limit\fR" 4
|
||
|
|
.IX Item "--recursion-limit"
|
||
|
|
.IP "\fB\-\-no\-recursion\-limit\fR" 4
|
||
|
|
.IX Item "--no-recursion-limit"
|
||
|
|
.PD
|
||
|
|
Enables or disables a limit on the amount of recursion performed
|
||
|
|
whilst demangling strings. Since the name mangling formats allow for
|
||
|
|
an infinite level of recursion it is possible to create strings whose
|
||
|
|
decoding will exhaust the amount of stack space available on the host
|
||
|
|
machine, triggering a memory fault. The limit tries to prevent this
|
||
|
|
from happening by restricting recursion to 2048 levels of nesting.
|
||
|
|
.Sp
|
||
|
|
The default is for this limit to be enabled, but disabling it may be
|
||
|
|
necessary in order to demangle truly complicated names. Note however
|
||
|
|
that if the recursion limit is disabled then stack exhaustion is
|
||
|
|
possible and any bug reports about such an event will be rejected.
|
||
|
|
.Sp
|
||
|
|
The \fB\-r\fR option is a synonym for the
|
||
|
|
\&\fB\-\-no\-recurse\-limit\fR option. The \fB\-R\fR option is a
|
||
|
|
synonym for the \fB\-\-recurse\-limit\fR option.
|
||
|
|
.IP "\fB\-s\fR \fIformat\fR" 4
|
||
|
|
.IX Item "-s format"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-format=\fR\fIformat\fR" 4
|
||
|
|
.IX Item "--format=format"
|
||
|
|
.PD
|
||
|
|
\&\fBc++filt\fR can decode various methods of mangling, used by
|
||
|
|
different compilers. The argument to this option selects which
|
||
|
|
method it uses:
|
||
|
|
.RS 4
|
||
|
|
.ie n .IP """auto""" 4
|
||
|
|
.el .IP "\f(CWauto\fR" 4
|
||
|
|
.IX Item "auto"
|
||
|
|
Automatic selection based on executable (the default method)
|
||
|
|
.ie n .IP """gnu""" 4
|
||
|
|
.el .IP "\f(CWgnu\fR" 4
|
||
|
|
.IX Item "gnu"
|
||
|
|
the one used by the \s-1GNU \*(C+\s0 compiler (g++)
|
||
|
|
.ie n .IP """lucid""" 4
|
||
|
|
.el .IP "\f(CWlucid\fR" 4
|
||
|
|
.IX Item "lucid"
|
||
|
|
the one used by the Lucid compiler (lcc)
|
||
|
|
.ie n .IP """arm""" 4
|
||
|
|
.el .IP "\f(CWarm\fR" 4
|
||
|
|
.IX Item "arm"
|
||
|
|
the one specified by the \*(C+ Annotated Reference Manual
|
||
|
|
.ie n .IP """hp""" 4
|
||
|
|
.el .IP "\f(CWhp\fR" 4
|
||
|
|
.IX Item "hp"
|
||
|
|
the one used by the \s-1HP\s0 compiler (aCC)
|
||
|
|
.ie n .IP """edg""" 4
|
||
|
|
.el .IP "\f(CWedg\fR" 4
|
||
|
|
.IX Item "edg"
|
||
|
|
the one used by the \s-1EDG\s0 compiler
|
||
|
|
.ie n .IP """gnu\-v3""" 4
|
||
|
|
.el .IP "\f(CWgnu\-v3\fR" 4
|
||
|
|
.IX Item "gnu-v3"
|
||
|
|
the one used by the \s-1GNU \*(C+\s0 compiler (g++) with the V3 \s-1ABI.\s0
|
||
|
|
.ie n .IP """java""" 4
|
||
|
|
.el .IP "\f(CWjava\fR" 4
|
||
|
|
.IX Item "java"
|
||
|
|
the one used by the \s-1GNU\s0 Java compiler (gcj)
|
||
|
|
.ie n .IP """gnat""" 4
|
||
|
|
.el .IP "\f(CWgnat\fR" 4
|
||
|
|
.IX Item "gnat"
|
||
|
|
the one used by the \s-1GNU\s0 Ada compiler (\s-1GNAT\s0).
|
||
|
|
.RE
|
||
|
|
.RS 4
|
||
|
|
.RE
|
||
|
|
.IP "\fB\-\-help\fR" 4
|
||
|
|
.IX Item "--help"
|
||
|
|
Print a summary of the options to \fBc++filt\fR and exit.
|
||
|
|
.IP "\fB\-\-version\fR" 4
|
||
|
|
.IX Item "--version"
|
||
|
|
Print the version number of \fBc++filt\fR and exit.
|
||
|
|
.IP "\fB@\fR\fIfile\fR" 4
|
||
|
|
.IX Item "@file"
|
||
|
|
Read command-line options from \fIfile\fR. The options read are
|
||
|
|
inserted in place of the original @\fIfile\fR option. If \fIfile\fR
|
||
|
|
does not exist, or cannot be read, then the option will be treated
|
||
|
|
literally, and not removed.
|
||
|
|
.Sp
|
||
|
|
Options in \fIfile\fR are separated by whitespace. A whitespace
|
||
|
|
character may be included in an option by surrounding the entire
|
||
|
|
option in either single or double quotes. Any character (including a
|
||
|
|
backslash) may be included by prefixing the character to be included
|
||
|
|
with a backslash. The \fIfile\fR may itself contain additional
|
||
|
|
@\fIfile\fR options; any such options will be processed recursively.
|
||
|
|
.SH "FOOTNOTES"
|
||
|
|
.IX Header "FOOTNOTES"
|
||
|
|
.IP "1." 4
|
||
|
|
MS-DOS does not allow \f(CW\*(C`+\*(C'\fR characters in file names, so on
|
||
|
|
MS-DOS this program is named \fB\s-1CXXFILT\s0\fR.
|
||
|
|
.SH "SEE ALSO"
|
||
|
|
.IX Header "SEE ALSO"
|
||
|
|
the Info entries for \fIbinutils\fR.
|
||
|
|
.SH "COPYRIGHT"
|
||
|
|
.IX Header "COPYRIGHT"
|
||
|
|
Copyright (c) 1991\-2022 Free Software Foundation, Inc.
|
||
|
|
.PP
|
||
|
|
Permission is granted to copy, distribute and/or modify this document
|
||
|
|
under the terms of the \s-1GNU\s0 Free Documentation License, Version 1.3
|
||
|
|
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 \*(L"\s-1GNU\s0 Free Documentation License\*(R".
|