Updated: 2022/Sep/29

Please read Privacy Policy. It's for your privacy.

DWARF_NEW_DIE(3)           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;

           /* ... assume dbg refers to a DWARF producer instance ... */

           die1 = dwarf_new_die(dbg, DW_TAG_compilation_unit, NULL, NULL, NULL,
               NULL, &de);
           if (die1 == NULL) {
                   warnx("dwarf_new_die failed: %s", dwarf_errmsg(-1));
                   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)

NetBSD 10.99                   September 4, 2011                  NetBSD 10.99