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DWARF_ATTR(3) FreeBSD Library Functions Manual DWARF_ATTR(3)
NAME
dwarf_attr - retrieve an attribute descriptor associated with a DWARF
debugging information entry
LIBRARY
DWARF Access Library (libdwarf, -ldwarf)
SYNOPSIS
#include <libdwarf.h>
int
dwarf_attr(Dwarf_Die die, Dwarf_Half attr, Dwarf_Attribute *atp,
Dwarf_Error *err);
DESCRIPTION
Function dwarf_attr() retrieves the attribute descriptor for an attribute
associated with the DWARF debugging information entry descriptor in
argument die.
DWARF attribute descriptors are represented by value of the opaque type
Dwarf_Attribute, see dwarf(3).
Argument attr names the desired DWARF attribute. Legal values for
argument attr are those denoted by the DW_AT_* constants in the DWARF
specification.
Argument atp points to a location into which the returned attribute
descriptor will be written. The returned descriptor may then be passed
to the form query functions in the dwarf(3) API set to access the data
associated with the attribute.
If argument err is non-NULL, it will be used to return an error
descriptor in case of an error.
RETURN VALUES
Function dwarf_attr() returns DW_DLV_OK on success.
If the debugging information entry descriptor denoted by argument die
does not contain the named attribute, the function returns
DW_DLV_NO_ENTRY and sets argument err. For other errors, it returns
DW_DLV_ERROR and sets argument err.
ERRORS
Function dwarf_attr() can fail with the following errors:
[DW_DLE_ARGUMENT] Either of arguments die or atp was NULL.
[DW_DLE_NO_ENTRY] Argument die had no attribute corresponding to the
value in argument attr.
SEE ALSO
dwarf(3), dwarf_attrlist(3), dwarf_attroffset(3), dwarf_hasattr(3),
dwarf_hasform(3), dwarf_whatattr(3), dwarf_whatform(3)
FreeBSD 14.0-RELEASE-p11 April 8, 2010 FreeBSD 14.0-RELEASE-p11