DWARF_GET_STR(3) BSD Library Functions Manual DWARF_GET_STR(3)
NAME
dwarf_get_str -- retrieve a string from the DWARF string section
LIBRARY
DWARF Access Library (libdwarf, -ldwarf)
SYNOPSIS
#include <libdwarf.h>
int
dwarf_get_str(Dwarf_Debug dbg, Dwarf_Off offset, char **string, Dwarf_Signed *len, Dwarf_Error *err);
DESCRIPTION
Function dwarf_get_str() retrieves a NUL-terminated string from the DWARF string section ``.debug_str''.
Argument dbg should reference a DWARF debug context allocated using dwarf_init(3).
Argument offset should be an offset, relative to the ``.debug_str'' section, specifying the start of the desired string.
Argument string should point to a location which will hold a returned pointer to a NUL-terminated string.
Argument len should point to a location which will hold the length of the returned string. The returned length does not include the space
needed for the NUL-terminator.
If argument err is not NULL, it will be used to store error information in case of an error.
RETURN VALUES
Function dwarf_get_str() returns DW_DLV_OK when it succeeds. It returns DW_DLV_NO_ENTRY if there is no ``.debug_str'' section associated
with the specified debugging context, or if the provided offset offset is at the very end of ``.debug_str'' section. In case of an error, it
returns DW_DLV_ERROR and sets the argument err.
ERRORS
Function dwarf_get_str() can fail with:
[DW_DLE_ARGUMENT] One of the arguments dbg, string or len was NULL.
[DW_DLE_ARGUMENT] Argument offset was out of range.
[DW_DLE_NO_ENTRY] The debugging context dbg did not contain a ``.debug_str'' string section.
[DW_DLE_NO_ENTRY] Argument offset was at the very end of the ``.debug_str'' section.
EXAMPLE
To retrieve all the strings in the DWARF string section, use:
Dwarf_Debug dbg;
Dwarf_Off offset;
Dwarf_Signed len;
Dwarf_Error de;
char *str;
int ret
offset = 0;
while ((ret = dwarf_get_str(dbg, offset, &str, &len, &de)) ==
DW_DLV_OK) {
/* .. Use the retrieved string. .. */
offset += len + 1; /* Account for the terminating NUL. */
}
if (ret == DW_DLV_ERROR)
warnx("dwarf_get_str: %s", dwarf_errmsg(de));
SEE ALSO
dwarf(3), dwarf_init(3)
BSD
April 3, 2011 BSD