FreeBSD manual
download PDF document: dwarf_new_die.3.pdf
DWARF_NEW_DIE(3) FreeBSD Library Functions Manual DWARF_NEW_DIE(3)
NAME
dwarf_new_die - allocate a new debugging information entry
LIBRARY
DWARF Access Library (libdwarf, -ldwarf)
SYNOPSIS
#include <libdwarf.h>
Dwarf_P_Die
dwarf_new_die(Dwarf_P_Debug dbg, Dwarf_Tag tag, Dwarf_P_Die parent,
Dwarf_P_Die child, Dwarf_P_Die left, Dwarf_P_Die right,
Dwarf_Error *err);
DESCRIPTION
Function dwarf_new_die() allocates a new DWARF debugging information
entry and links it to another debugging information entry.
Argument dbg should reference a DWARF producer instance allocated using
dwarf_producer_init(3) or dwarf_producer_init_b(3).
Argument tag should specify the tag of the newly created debugging
information entry. Valid values for this argument are those for the
DW_TAG_* symbols defined in <libdwarf.h>.
Argument parent specifies the parent link of the debugging information
entry.
Argument child specifies the first child link of the debugging
information entry.
Argument left specifies the left sibling link of the debugging
information entry.
Argument right specifies the right sibling link of the debugging
information entry.
Only one of arguments parent, child, left and right is allowed to be non-
NULL. Application code can subsequently call the function
dwarf_die_link(3) to change the links for the created debugging
information entry.
If argument err is not NULL, it will be used to store error information
in case of an error.
RETURN VALUES
On success, function dwarf_new_die() returns the newly created debugging
information entry. In case of an error, function dwarf_new_die() returns
DW_DLV_BADADDR and sets the argument err.
EXAMPLES
To create debugging information entries and add them to the producer
instance, use:
Dwarf_P_Debug dbg;
Dwarf_P_Die die1, die2;
Dwarf_Error de;
return;
}
die2 = dwarf_new_die(dbg, DW_TAG_base_type, die1, NULL, NULL,
NULL, &de);
if (die1 == NULL) {
warnx("dwarf_new_die failed: %s", dwarf_errmsg(-1));
return;
}
if (dwarf_add_die_to_debug(dbg, die1, &de) != DW_DLV_OK) {
warnx("dwarf_add_die_to_debug failed: %s", dwarf_errmsg(-1));
return;
}
ERRORS
Function dwarf_new_die() can fail with:
[DW_DLE_ARGUMENT] Argument dbg was NULL.
[DW_DLE_ARGUMENT] More than one of the arguments parent, child, left
and right were non-NULL.
[DW_DLE_MEMORY] An out of memory condition was encountered during the
execution of the function.
SEE ALSO
dwarf(3), dwarf_add_die_to_debug(3), dwarf_die_link(3),
dwarf_producer_init(3), dwarf_producer_init_b(3)
FreeBSD 14.0-RELEASE-p6 September 4, 2011 FreeBSD 14.0-RELEASE-p6