dwarf_seterrhand(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_NEXT_TYPES_SECTION(3)				   BSD Library Functions Manual 			       DWARF_NEXT_TYPES_SECTION(3)

NAME

     dwarf_next_types_section -- step through .debug_types sections in a debug context

LIBRARY

     DWARF Access Library (libdwarf, -ldwarf)

SYNOPSIS

     #include <libdwarf.h>

     int
     dwarf_next_types_section(Dwarf_Debug dbg, Dwarf_Error *err);

DESCRIPTION

     Function dwarf_next_types_section() steps through the ``.debug_types'' sections found in a debug context.

     Argument dbg should reference a DWARF debug context allocated using dwarf_init(3).  Argument err should point to a location that will hold an
     error descriptor in case of an error.

     When a DWARF debug context is allocated using dwarf_init(3), an internal pointer associated with the context will point to the first
     ``.debug_types'' section present in the debug object.  When the application calls function dwarf_next_types_section(), this internal pointer
     will move to the next ``.debug_types'' section present.  On stepping past the last ``.debug_types'' section left in the debug context, func-
     tion dwarf_next_types_section() returns DW_DLV_NO_ENTRY.  The next call to the function will restart from the first ``.debug_types'' section
     in the debug context.

     Application code should call function dwarf_next_cu_header_c(3) to iterate though the type units associated with the current ``.debug_types''
     section.

RETURN VALUES

     On success, function dwarf_next_types_section() returns DW_DLV_OK.

     In case of an error, it returns DW_DLV_ERROR and sets argument err.  When there are no more ``.debug_types'' sections left to traverse, it
     returns DW_DLV_NO_ENTRY.

COMPATIBILITY

     This function is an extension to the DWARF(3) API.

ERRORS

     The dwarf_next_types_section() function may fail with the following errors:

     [DW_DLE_ARGUMENT]	Argument dbg was NULL.

EXAMPLES

     To iterate though every type unit in all the ``.debug_types'' sections found in a debug context:

	   Dwarf_Debug dbg;
	   Dwarf_Sig8 sig8;
	   Dwarf_Unsigned typeoff;
	   Dwarf_Error de;

	   ... allocate dbg using dwarf_init() etc ...

	   do {
		   while ((ret = dwarf_next_cu_header_c(dbg, 0, NULL, NULL, NULL,
		       NULL, NULL, NULL, &sig8, &typeoff, NULL, &de)) == DW_DLV_OK) {
			   /* Access DIEs etc ... */
		   }
	   } while (dwarf_next_types_section(dbg, &de) == DW_DLV_OK);

SEE ALSO

     dwarf(3), dwarf_init(3), dwarf_next_cu_header_c(3)

BSD
								 December 20, 2014							       BSD