dwarf_seterrarg(3) [freebsd man page]

DWARF_SETERRARG(3)					   BSD Library Functions Manual 					DWARF_SETERRARG(3)

NAME

     dwarf_seterrarg, dwarf_seterrhand -- configure error handling

LIBRARY

     DWARF Access Library (libdwarf, -ldwarf)

SYNOPSIS

     #include <libdwarf.h>

     Dwarf_Ptr
     dwarf_seterrarg(Dwarf_Debug dbg, Dwarf_Ptr arg);

     Dwarf_Handler
     dwarf_seterrhand(Dwarf_Debug dbg, Dwarf_Handler handler);

DESCRIPTION

     These functions may be used by applications to configure error handling callbacks.  The error handling scheme used by the library is
     described in dwarf(3).

     Function dwarf_seterrarg() may be used to set the callback argument passed to a configured error handler at the time it is invoked.  Argument
     arg is the callback argument being set.  Argument dbg can be a debug context allocated by a prior call to dwarf_init(3), or can be NULL to
     indicate that the library-wide callback argument is to be set.

     Function dwarf_seterrhand() may be used to associate an error handler denoted by argument handler with the DWARF debug context descriptor
     denoted by argument dbg.  Argument dbg should be a debug context allocated by a prior call to dwarf_init(3), or may be NULL to indicate that
     the library-wide error handler is to be set.

RETURN VALUES

     Function dwarf_seterrhand() returns the previous error handler associated with argument dbg.  If argument dbg is NULL, function
     dwarf_seterrhand() returns the previous library-wide error handler.

     Function dwarf_seterrarg() returns the previous callback argument associated with argument dbg.  If argument dbg is NULL, function
     dwarf_seterrarg() returns the previous library-wide callback argument.

COMPATIBILITY

     The behavior of these functions when argument dbg is NULL is a local extension.

ERRORS

     These functions do not set an error code.

SEE ALSO

     dwarf(3), dwarf_init(3)

BSD
								   May 01, 2010 							       BSD

DWARF_FINISH(3) 					   BSD 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);

SEE ALSO

     elf_end(3), dwarf_elf_init(3), dwarf_get_elf(3), dwarf_init(3), dwarf_object_init(3)

BSD
								 November 9, 2011							       BSD