dwarf_hasattr —
check for the presence of an attribute
DWARF Access Library (libdwarf, -ldwarf)
#include
<libdwarf.h>
int
dwarf_hasattr(
Dwarf_Die
die,
Dwarf_Half attr,
Dwarf_Bool *ret_bool,
Dwarf_Error *err);
Function
dwarf_hasattr() tests whether the
debugging information entry referenced in argument
die contains the attribute named by argument
attr. Legal values for argument
attr are those denoted by the
DW_AT_* constants in the DWARF
specification.
If the named attribute is present in the debugging information entry, function
dwarf_hasattr() returns a non-zero value in the
location pointed to by argument
ret_bool. If
the named attribute is not present, a zero is written instead.
If argument
err is not NULL, it will be used to
return an error descriptor in case of an error.
On success, function
dwarf_hasattr() returns
DW_DLV_OK. In case of an error, it returns
DW_DLV_ERROR and sets argument
err.
Function
dwarf_hasattr() can fail with the
following error:
-
-
- [
DW_DLE_ARGUMENT]
- Either of argument die or
ret_bool was NULL.
dwarf(3),
dwarf_attr(3),
dwarf_whatattr(3)