using dwarf_validate_die_sibling

Example of a DIE tree validation.

Example of a DIE tree validation.

Here we show how one uses dwarf_validate_die_sibling(). Dwarfdump uses this function as a part of its validation of DIE trees.

It is not something you need to use. But one must use it in a specific pattern for it to work properly.

dwarf_validate_die_sibling() depends on data set by dwarf_child() preceeding dwarf_siblingof_b() . dwarf_child() records a little bit of information invisibly in the Dwarf_Debug data.

*/
 
int example_sibvalid(Dwarf_Debug dbg,
    Dwarf_Die in_die,
    Dwarf_Error*error)
{
    int        cres = DW_DLV_OK;
    int        sibres = DW_DLV_OK;
    Dwarf_Die  die = 0;
    Dwarf_Die  sibdie = 0;
    Dwarf_Die  child = 0;
    Dwarf_Bool is_info = dwarf_get_die_infotypes_flag(die);
 
    die = in_die;
    for ( ; die ; die = sibdie) {
        int vres = 0;
        Dwarf_Unsigned offset = 0;
 
        /* Maybe print something you extract from the DIE