dwarf_new_die —
allocate a new debugging information entry
DWARF Access Library (libdwarf, -ldwarf)
#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);
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.
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.
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;
}
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.
dwarf(3),
dwarf_add_die_to_debug(3),
dwarf_die_link(3),
dwarf_producer_init(3),
dwarf_producer_init_b(3)