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DWARF_FINISH(3)

Library Functions Manual

DWARF_FINISH(3)

NAME

dwarf_finish, dwarf_object_finish — free resources associated with a debug descriptor

LIBRARY

DWARF Access Library (libdwarf, -ldwarf)

SYNOPSIS

#include <libdwarf.h>

int
dwarf_finish(Dwarf_Debug dbg, Dwarf_Error *err);

int
dwarf_object_finish(Dwarf_Debug dbg, Dwarf_Error *err);

DESCRIPTION

The dwarf_finish() and dwarf_object_finish() functions are used to release the resources associated with a debug descriptor allocated by a prior call to dwarf_init(3) and dwarf_object_init(3) respectively.

Argument dbg denotes a valid Dwarf_Debug instance. Argument err will be used to record error information in case of an error.

After a call to dwarf_finish() or dwarf_object_finish(), the argument dbg will be invalid and should not be used further.

For Dwarf_Debug descriptors opened using dwarf_init(3), the application would need to explicitly release the Elf instance associated with the descriptor by first retrieving the instance using dwarf_get_elf(3) and closing it using elf_end(3).

RETURN VALUES

These functions return DW_DLV_OK if successful. In case of an error, the functions return DW_DLV_ERROR and record additional information in argument err.

EXAMPLES

To deallocate a Dwarf_Debug instance allocated using dwarf_elf_init(3) use:

Dwarf_Debug dbg; 
Dwarf_Error de; 
 
if (dwarf_finish(dbg, &de) != DW_DLV_OK) 
	errx(EXIT_FAILURE, "dwarf_finish: %s", dwarf_errmsg(de));

To deallocate a Dwarf_Debug instance allocated using dwarf_object_init(3) use:

Dwarf_Debug dbg; 
Dwarf_Error de; 
 
if (dwarf_object_finish(dbg, &de) != DW_DLV_OK) 
	errx(EXIT_FAILURE, "dwarf_object_finish: %s", 
	    dwarf_errmsg(de));

To deallocate a Dwarf_Debug instance allocated using dwarf_init(3) use:

Dwarf_Debug dbg; 
Dward_Error de; 
Elf *e; 
 
if (dwarf_get_elf(dbg, &e, &de) != DW_DLV_OK) 
	errx(EXIT_FAILURE, "dwarf_get_elf: %s", dwarf_errmsg(&de)); 
 
if (dwarf_finish(dbg, &de) != DW_DLV_OK) 
	errx(EXIT_FAILURE, "dwarf_finish: %s", dwarf_errmsg(de)); 
 
(void) elf_end(e);