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dwarf_get_abbrev_children_flag(3) [freebsd man page]

DWARF_GET_ABBREV_CHILDREN_FLAG(3)			   BSD Library Functions Manual 			 DWARF_GET_ABBREV_CHILDREN_FLAG(3)

NAME
dwarf_get_abbrev_children_flag -- return a flag indicating the presence of children LIBRARY
DWARF Access Library (libdwarf, -ldwarf) SYNOPSIS
#include <libdwarf.h> int dwarf_get_abbrev_children_flag(Dwarf_Abbrev abbrev, Dwarf_Signed *ret, Dwarf_Error *err); DESCRIPTION
Function dwarf_get_abbrev_children_flag() retrieves a flag indicating whether the DWARF debug information entry associated with a DWARF abbreviation descriptor has child entries. Argument abbrev should be a valid DWARF abbreviation descriptor, as returned by dwarf_get_abbrev(3). Argument ret should point to a location which will hold the returned flag. The value returned will be one of the following: DW_CHILDREN_yes The debugging information entry associated with the specified abbreviation descriptor has children. DW_CHILDREN_no The debugging information entry associated with the specified abbreviation descriptor has no children. If argument err is not NULL, it will be used to store error information in case of an error. RETURN VALUES
Function dwarf_get_abbrev_children_flag() returns DW_DLV_OK when it succeeds. In case of an error, it returns DW_DLV_ERROR and sets the argument err. ERRORS
Function dwarf_get_abbrev_children_flag() can fail with: [DW_DLE_ARGUMENT] Either of arguments abbrev or ret was NULL. SEE ALSO
dwarf(3), dwarf_get_abbrev(3), dwarf_get_abbrev_code(3), dwarf_get_abbrev_tag(3), dwarf_get_abbrev_entry(3) BSD
March 14, 2011 BSD

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DWARF_GET_ABBREV_ENTRY(3)				   BSD Library Functions Manual 				 DWARF_GET_ABBREV_ENTRY(3)

NAME
dwarf_get_abbrev_entry -- retrieve attribute information from an abbreviation descriptor LIBRARY
DWARF Access Library (libdwarf, -ldwarf) SYNOPSIS
#include <libdwarf.h> int dwarf_get_abbrev_entry(Dwarf_Abbrev abbrev, Dwarf_Signed ndx, Dwarf_Half *code, Dwarf_Signed *form, Dwarf_Off *offset, Dwarf_Error *err); DESCRIPTION
Function dwarf_get_abbrev_entry() retrieves attribute information from a DWARF abbreviation descriptor. Argument abbrev should be a valid abbreviation descriptor, as returned by function dwarf_get_abbrev(3). Argument ndx specifies the 0-based index of the attribute. The total count of the attributes contained in the abbreviation entry can be retrieved using the function dwarf_get_abbrev(3). Argument code should point to a location which will hold a returned attribute code. Argument form should point to a location which will hold the returned form of the attribute. Argument offset should point to a location which will hold a returned offset, relative to the ``.debug_abbrev'' section, for the specified attribute. If argument err is not NULL, it will be used to return an error descriptor in case of an error. RETURN VALUES
Function dwarf_get_abbrev_entry() returns DW_DLV_OK when it succeeds. It returns DW_DLV_NO_ENTRY if the attribute index specified by argu- ment ndx is out of range. In case of an error, it returns DW_DLV_ERROR and sets the argument err. ERRORS
Function dwarf_get_abbrev_entry() can fail with: [DW_DLE_ARGUMENT] One of the arguments abbrev, code, form or offset was NULL. [DW_DLE_NO_ENTRY] The attribute index specified by argument ndx was out of range. EXAMPLE
To loop through all the attribute entries contained in the abbreviation section, use: Dwarf_Debug dbg; Dwarf_Abbrev ab; Dwarf_Off aboff, atoff; Dwarf_Signed form; Dwarf_Half attr; Dwarf_Unsigned length, attr_count; Dwarf_Error de; int i, ret; /* ...allocate 'dbg' using dwarf_init(3) ... */ while ((ret = dwarf_next_cu_header(dbg, NULL, NULL, &aboff, NULL, NULL, &de)) == DW_DLV_OK) { while ((ret = dwarf_get_abbrev(dbg, aboff, &ab, &length, &attr_count, &de)) == DW_DLV_OK) { if (length == 1) /* Last entry. */ break; aboff += length; for (i = 0; (Dwarf_Unsigned) i < attr_count; i++) { if (dwarf_get_abbrev_entry(ab, i, &attr, &form, &atoff, &de) != DW_DLV_OK) { warnx("dwarf_get_abbrev_entry failed:" " %s", dwarf_errmsg(de)); continue; } /* .. use the retrieved information ... */ } } if (ret != DW_DLV_OK) warnx("dwarf_get_abbrev: %s", dwarf_errmsg(de)); } if (ret == DW_DLV_ERROR) warnx("dwarf_next_cu_header: %s", dwarf_errmsg(de)); SEE ALSO
dwarf(3), dwarf_get_abbrev(3) BSD
April 02, 2011 BSD

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