mirror of
https://github.com/freebsd/freebsd-src
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ae500c1ff8
Highlights: - Make sure that only TLS sections are sorted into TLS segment. - Fixed multiple errors in "Section to Segment mapping". - Man page updates - ar improvements - elfcopy: avoid filter_reloc uninitialized variable for rela - elfcopy: avoid stripping relocations from static binaries - readelf: avoid printing directory in front of absolute path - readelf: add NT_FREEBSD_FEATURE_CTL FreeBSD note type - test improvements NOTES: Some of these changes originated in FreeBSD and simply reduce diffs between contrib and vendor. ELF Tool Chain ar is not (currently) used in FreeBSD, and there are improvements in both FreeBSD and ELF Tool Chain ar that are not in the other. Sponsored by: The FreeBSD Foundation
204 lines
5.2 KiB
Groff
204 lines
5.2 KiB
Groff
.\" Copyright (c) 2009-2011 Joseph Koshy. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" This software is provided by Joseph Koshy ``as is'' and
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.\" any express or implied warranties, including, but not limited to, the
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.\" implied warranties of merchantability and fitness for a particular purpose
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.\" are disclaimed. in no event shall Joseph Koshy be liable
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.\" for any direct, indirect, incidental, special, exemplary, or consequential
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.\" damages (including, but not limited to, procurement of substitute goods
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.\" or services; loss of use, data, or profits; or business interruption)
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.\" however caused and on any theory of liability, whether in contract, strict
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.\" liability, or tort (including negligence or otherwise) arising in any way
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.\" out of the use of this software, even if advised of the possibility of
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.\" such damage.
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.\"
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.\" $Id: dwarf_dealloc.3 3640 2018-10-14 14:09:13Z jkoshy $
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.\"
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.Dd July 23, 2011
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.Dt DWARF_DEALLOC 3
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.Os
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.Sh NAME
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.Nm dwarf_dealloc ,
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.Nm dwarf_fde_cie_list_dealloc ,
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.Nm dwarf_funcs_dealloc ,
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.Nm dwarf_globals_dealloc ,
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.Nm dwarf_pubtypes_dealloc ,
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.Nm dwarf_ranges_dealloc ,
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.Nm dwarf_srclines_dealloc ,
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.Nm dwarf_types_dealloc ,
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.Nm dwarf_vars_dealloc ,
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.Nm dwarf_weaks_dealloc
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.Nd release resources
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.Sh LIBRARY
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.Lb libdwarf
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.Sh SYNOPSIS
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.In libdwarf.h
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.Ft void
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.Fo dwarf_dealloc
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.Fa "Dwarf_Debug dbg"
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.Fa "Dwarf_Ptr ptr"
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.Fa "Dwarf_Unsigned type"
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.Fc
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.Fo dwarf_fde_cie_list_dealloc
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.Fa "Dwarf_Debug dbg"
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.Fa "Dwarf_Cie *cie_list"
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.Fa "Dwarf_Signed cie_count"
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.Fa "Dwarf_Fde *fde_list"
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.Fa "Dwarf_Signed fde_count"
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.Fc
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.Ft void
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.Fo dwarf_funcs_dealloc
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.Fa "Dwarf_Debug dbg"
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.Fa "Dwarf_Func *funcs"
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.Fa "Dwarf_Signed funccount"
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.Fc
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.Ft void
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.Fo dwarf_globals_dealloc
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.Fa "Dwarf_Debug dbg"
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.Fa "Dwarf_Global *globals"
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.Fa "Dwarf_Signed globalcount"
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.Fc
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.Ft void
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.Fo dwarf_pubtypes_dealloc
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.Fa "Dwarf_Debug dbg"
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.Fa "Dwarf_Type *pubtypes"
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.Fa "Dwarf_Signed pubtypecount"
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.Fc
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.Ft void
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.Fo dwarf_ranges_dealloc
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.Fa "Dwarf_Debug dbg"
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.Fa "Dwarf_Ranges *ranges"
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.Fa "Dwarf_Signed rangecount"
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.Fc
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.Ft void
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.Fo dwarf_srclines_dealloc
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.Fa "Dwarf_Debug dbg"
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.Fa "Dwarf_Line *lines"
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.Fa "Dwarf_Signed linecount"
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.Fc
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.Ft void
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.Fo dwarf_types_dealloc
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.Fa "Dwarf_Debug dbg"
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.Fa "Dwarf_Type *types"
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.Fa "Dwarf_Signed typecount"
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.Fc
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.Ft void
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.Fo dwarf_vars_dealloc
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.Fa "Dwarf_Debug dbg"
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.Fa "Dwarf_Var *vars"
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.Fa "Dwarf_Signed varcount"
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.Fc
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.Ft void
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.Fo dwarf_weaks_dealloc
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.Fa "Dwarf_Debug dbg"
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.Fa "Dwarf_Weak *weaks"
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.Fa "Dwarf_Signed weakcount"
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.Fc
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.Sh DESCRIPTION
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The function
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.Fn dwarf_dealloc
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is used by applications to indicate that memory areas returned by
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.Lb libdwarf
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may be safely disposed off.
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Due to the way memory is managed in the current implementation, the
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use of
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.Fn dwarf_dealloc
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is only necessary for a small set of DWARF types.
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.Pp
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Argument
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.Ar dbg
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should reference a valid debugging context allocated using
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.Xr dwarf_init 3 .
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.Pp
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Argument
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.Ar ptr
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should point to an object or memory area obtained by a prior call
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to a DWARF(3) function.
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.Pp
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Argument
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.Ar type
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indicates the type of object being deallocated.
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The indicated type must match that of the object being passed in
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argument
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.Ar ptr .
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Valid values for the
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.Ar type
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argument are:
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.Bl -tag -width ".Dv DW_DLA_FRAME_BLOCK"
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.It Dv DW_DLA_ABBREV
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An object of type
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.Vt Dwarf_Abbrev ,
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as returned by a call to the function
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.Xr dwarf_get_abbrev 3 .
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.It Dv DW_DLA_DIE
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An object of type
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.Vt Dwarf_Die ,
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as returned by calls to the functions
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.Xr dwarf_child 3 ,
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.Xr dwarf_offdie 3
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or
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.Xr dwarf_siblingof 3 .
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.It Dv DW_DLA_FRAME_BLOCK
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An array of objects of type
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.Vt Dwarf_Frame_op ,
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as returned by a call to the function
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.Xr dwarf_expand_frame_instructions 3 .
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.El
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.Pp
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Calls to
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.Fn dwarf_dealloc
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with other values for argument
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.Ar type
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are no-ops in this implementation.
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.Pp
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The functions
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.Fn dwarf_fde_cie_list_dealloc ,
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.Fn dwarf_funcs_dealloc ,
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.Fn dwarf_globals_dealloc ,
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.Fn dwarf_pubtypes_dealloc ,
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.Fn dwarf_ranges_dealloc ,
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.Fn dwarf_srclines_dealloc ,
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.Fn dwarf_types_dealloc ,
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.Fn dwarf_vars_dealloc
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and
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.Fn dwarf_weaks_dealloc
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are provided for compatibility with other implementations of the
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DWARF(3) API.
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Due to the way memory is managed in the current implementation, these
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functions are effectively no-ops.
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.Pp
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See
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.Xr dwarf 3
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for more information about the memory management scheme in this
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implementation of the DWARF(3) API.
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.Sh RETURN VALUES
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Functions
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.Fn dwarf_dealloc ,
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.Fn dwarf_fde_cie_list_dealloc ,
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.Fn dwarf_funcs_dealloc ,
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.Fn dwarf_globals_dealloc ,
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.Fn dwarf_pubtypes_dealloc ,
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.Fn dwarf_ranges_dealloc ,
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.Fn dwarf_srclines_dealloc ,
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.Fn dwarf_types_dealloc ,
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.Fn dwarf_vars_dealloc
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and
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.Fn dwarf_weaks_dealloc
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have no return value.
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.Sh SEE ALSO
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.Xr dwarf 3 ,
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.Xr dwarf_child 3 ,
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.Xr dwarf_expand_frame_instructions 3 ,
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.Xr dwarf_get_abbrev 3 ,
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.Xr dwarf_offdie 3 ,
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.Xr dwarf_siblingof 3
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