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'\" t
.\" Manual page created with latex2man on Thu Aug 16 09:44:45 MDT 2007
.\" NOTE: This file is generated, DO NOT EDIT.
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.TH "UNW\\_GET\\_PROC\\_NAME" "3" "16 August 2007" "Programming Library " "Programming Library "
.SH NAME
unw_get_proc_name
\-\- get name of current procedure
.PP
.SH SYNOPSIS
.PP
#include <libunwind.h>
.br
.PP
int
unw_get_proc_name(unw_cursor_t *cp,
char *bufp,
size_t
len,
unw_word_t *offp);
.br
.PP
.SH DESCRIPTION
.PP
The unw_get_proc_name()
routine returns the name of the
procedure that created the stack frame identified by argument
cp\&.
The bufp
argument is a pointer to a character buffer
that is at least len
bytes long. This buffer is used to return
the name of the procedure. The offp
argument is a pointer to a
word that is used to return the byte\-offset of the instruction\-pointer
saved in the stack frame identified by cp,
relative to the start
of the procedure. For example, if procedure foo()
starts at
address 0x40003000, then invoking unw_get_proc_name()
on a
stack frame with an instruction\-pointer value of 0x40003080 would
return a value of 0x80 in the word pointed to by offp
(assuming
the procedure is at least 0x80 bytes long).
.PP
Note that on some platforms there is no reliable way to distinguish
between procedure names and ordinary labels. Furthermore, if symbol
information has been stripped from a program, procedure names may be
completely unavailable or may be limited to those exported via a
dynamic symbol table. In such cases, unw_get_proc_name()
may return the name of a label or a preceeding (nearby) procedure.
However, the offset returned through offp
is always relative to
the returned name, which ensures that the value (address) of the
returned name plus the returned offset will always be equal to the
instruction\-pointer of the stack frame identified by cp\&.
.PP
.SH RETURN VALUE
.PP
On successful completion, unw_get_proc_name()
returns 0.
Otherwise the negative value of one of the error\-codes below is
returned.
.PP
.SH THREAD AND SIGNAL SAFETY
.PP
unw_get_proc_name()
is thread\-safe. If cursor cp
is
in the local address\-space, this routine is also safe to use from a
signal handler.
.PP
.SH ERRORS
.PP
.TP
UNW_EUNSPEC
An unspecified error occurred.
.TP
UNW_ENOINFO
Libunwind
was unable to determine
the name of the procedure.
.TP
UNW_ENOMEM
The procedure name is too long to fit
in the buffer provided. A truncated version of the name has been
returned.
.PP
In addition, unw_get_proc_name()
may return any error
returned by the access_mem()
call\-back (see
unw_create_addr_space(3)).
.PP
.SH SEE ALSO
.PP
libunwind(3),
unw_get_proc_info(3)
.PP
.SH AUTHOR
.PP
David Mosberger\-Tang
.br
Email: \fBdmosberger@gmail.com\fP
.br
WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
.\" NOTE: This file is generated, DO NOT EDIT.
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