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binutils-gdb/libctf/ctf-impl.h
Nick Alcock 676c3ecbad libctf: avoid the need to ever use ctf_update 
The method of operation of libctf when the dictionary is writable has
before now been that types that are added land in the dynamic type
section, which is a linked list and hash of IDs -> dynamic type
definitions (and, recently a hash of names): the DTDs are a bit of CTF
representing the ctf_type_t and ad hoc C structures representing the
vlen.  Historically, libctf was unable to do anything with these types,
not even look them up by ID, let alone by name: if you wanted to do that
say if you were adding a type that depended on one you just added) you
called ctf_update, which serializes all the DTDs into a CTF file and
reopens it, copying its guts over the fp it's called with.  The
ctf_updated types are then frozen in amber and unchangeable: all lookups
will return the types in the static portion in preference to the dynamic
portion, and we will refuse to re-add things that already exist in the
static portion (and, of late, in the dynamic portion too).  The libctf
machinery remembers the boundary between static and dynamic types and
looks in the right portion for each type.  Lots of things still don't
quite work with dynamic types (e.g. getting their size), but enough
works to do a bunch of additions and then a ctf_update, most of the
time.

Except it doesn't, because ctf_add_type finds it necessary to walk the
full dynamic type definition list looking for types with matching names,
so it gets slower and slower with every type you add: fixing this
requires calling ctf_update periodically for no other reason than to
avoid massively slowing things down.

This is all clunky and very slow but kind of works, until you consider
that it is in fact possible and indeed necessary to modify one sort of
type after it has been added: forwards.  These are necessarily promoted
to structs, unions or enums, and when they do so *their type ID does not
change*.  So all of a sudden we are changing types that already exist in
the static portion.  ctf_update gets massively confused by this and
allocates space enough for the forward (with no members), but then emits
the new dynamic type (with all the members) into it.  You get an
assertion failure after that, if you're lucky, or a coredump.

So this commit rejigs things a bit and arranges to exclusively use the
dynamic type definitions in writable dictionaries, and the static type
definitions in readable dictionaries: we don't at any time have a mixture
of static and dynamic types, and you don't need to call ctf_update to
make things "appear".  The ctf_dtbyname hash I introduced a few months
ago, which maps things like "struct foo" to DTDs, is removed, replaced
instead by a change of type of the four dictionaries which track names.
Rather than just being (unresizable) ctf_hash_t's populated only at
ctf_bufopen time, they are now a ctf_names_t structure, which is a pair
of ctf_hash_t and ctf_dynhash_t, with the ctf_hash_t portion being used
in readonly dictionaries, and the ctf_dynhash_t being used in writable
ones.  The decision as to which to use is centralized in the new
functions ctf_lookup_by_rawname (which takes a type kind) and
ctf_lookup_by_rawhash, which it calls (which takes a ctf_names_t *.)

This change lets us switch from using static to dynamic name hashes on
the fly across the entirety of libctf without complexifying anything: in
fact, because we now centralize the knowledge about how to map from type
kind to name hash, it actually simplifies things and lets us throw out
quite a lot of now-unnecessary complexity, from ctf_dtnyname (replaced
by the dynamic half of the name tables), through to ctf_dtnextid (now
that a dictionary's static portion is never referenced if the dictionary
is writable, we can just use ctf_typemax to indicate the maximum type:
dynamic or non-dynamic does not matter, and we no longer need to track
the boundary between the types).  You can now ctf_rollback() as far as
you like, even past a ctf_update or for that matter a full writeout; all
the iteration functions work just as well on writable as on read-only
dictionaries; ctf_add_type no longer needs expensive duplicated code to
run over the dynamic types hunting for ones it might be interested in;
and the linker no longer needs a hack to call ctf_update so that calling
ctf_add_type is not impossibly expensive.

There is still a bit more complexity: some new code paths in ctf-types.c
need to know how to extract information from dynamic types.  This
complexity will go away again in a few months when libctf acquires a
proper intermediate representation.

You can still call ctf_update if you like (it's public API, after all),
but its only effect now is to set the point to which ctf_discard rolls
back.

Obviously *something* still needs to serialize the CTF file before
writeout, and this job is done by ctf_serialize, which does everything
ctf_update used to except set the counter used by ctf_discard.  It is
automatically called by the various functions that do CTF writeout:
nobody else ever needs to call it.

With this in place, forwards that are promoted to non-forwards no longer
crash the link, even if it happens tens of thousands of types later.

v5: fix tabdamage.

libctf/
	* ctf-impl.h (ctf_names_t): New.
	(ctf_lookup_t) <ctf_hash>: Now a ctf_names_t, not a ctf_hash_t.
	(ctf_file_t) <ctf_structs>: Likewise.
	<ctf_unions>: Likewise.
	<ctf_enums>: Likewise.
	<ctf_names>: Likewise.
	<ctf_lookups>: Improve comment.
	<ctf_ptrtab_len>: New.
	<ctf_prov_strtab>: New.
	<ctf_str_prov_offset>: New.
	<ctf_dtbyname>: Remove, redundant to the names hashes.
	<ctf_dtnextid>: Remove, redundant to ctf_typemax.
	(ctf_dtdef_t) <dtd_name>: Remove.
	<dtd_data>: Note that the ctt_name is now populated.
	(ctf_str_atom_t) <csa_offset>: This is now the strtab
	offset for internal strings too.
	<csa_external_offset>: New, the external strtab offset.
	(CTF_INDEX_TO_TYPEPTR): Handle the LCTF_RDWR case.
	(ctf_name_table): New declaration.
	(ctf_lookup_by_rawname): Likewise.
	(ctf_lookup_by_rawhash): Likewise.
	(ctf_set_ctl_hashes): Likewise.
	(ctf_serialize): Likewise.
	(ctf_dtd_insert): Adjust.
	(ctf_simple_open_internal): Likewise.
	(ctf_bufopen_internal): Likewise.
	(ctf_list_empty_p): Likewise.
	(ctf_str_remove_ref): Likewise.
	(ctf_str_add): Returns uint32_t now.
	(ctf_str_add_ref): Likewise.
	(ctf_str_add_external): Now returns a boolean (int).
	* ctf-string.c (ctf_strraw_explicit): Check the ctf_prov_strtab
	for strings in the appropriate range.
	(ctf_str_create_atoms): Create the ctf_prov_strtab.  Detect OOM
	when adding the null string to the new strtab.
	(ctf_str_free_atoms): Destroy the ctf_prov_strtab.
	(ctf_str_add_ref_internal): Add make_provisional argument.  If
	make_provisional, populate the offset and fill in the
	ctf_prov_strtab accordingly.
	(ctf_str_add): Return the offset, not the string.
	(ctf_str_add_ref): Likewise.
	(ctf_str_add_external): Return a success integer.
	(ctf_str_remove_ref): New, remove a single ref.
	(ctf_str_count_strtab): Do not count the initial null string's
	length or the existence or length of any unreferenced internal
	atoms.
	(ctf_str_populate_sorttab): Skip atoms with no refs.
	(ctf_str_write_strtab): Populate the nullstr earlier.  Add one
	to the cts_len for the null string, since it is no longer done
	in ctf_str_count_strtab.  Adjust for csa_external_offset rename.
	Populate the csa_offset for both internal and external cases.
	Flush the ctf_prov_strtab afterwards, and reset the
	ctf_str_prov_offset.
	* ctf-create.c (ctf_grow_ptrtab): New.
	(ctf_create): Call it.	Initialize new fields rather than old
	ones.  Tell ctf_bufopen_internal that this is a writable dictionary.
	Set the ctl hashes and data model.
	(ctf_update): Rename to...
	(ctf_serialize): ... this.  Leave a compatibility function behind.
	Tell ctf_simple_open_internal that this is a writable dictionary.
	Pass the new fields along from the old dictionary.  Drop
	ctf_dtnextid and ctf_dtbyname.	Use ctf_strraw, not dtd_name.
	Do not zero out the DTD's ctt_name.
	(ctf_prefixed_name): Rename to...
	(ctf_name_table): ... this.  No longer return a prefixed name: return
	the applicable name table instead.
	(ctf_dtd_insert): Use it, and use the right name table.	 Pass in the
	kind we're adding.  Migrate away from dtd_name.
	(ctf_dtd_delete): Adjust similarly.  Remove the ref to the
	deleted ctt_name.
	(ctf_dtd_lookup_type_by_name): Remove.
	(ctf_dynamic_type): Always return NULL on read-only dictionaries.
	No longer check ctf_dtnextid: check ctf_typemax instead.
	(ctf_snapshot): No longer use ctf_dtnextid: use ctf_typemax instead.
	(ctf_rollback): Likewise.  No longer fail with ECTF_OVERROLLBACK. Use
	ctf_name_table and the right name table, and migrate away from
	dtd_name as in ctf_dtd_delete.
	(ctf_add_generic): Pass in the kind explicitly and pass it to
	ctf_dtd_insert. Use ctf_typemax, not ctf_dtnextid.  Migrate away
	from dtd_name to using ctf_str_add_ref to populate the ctt_name.
	Grow the ptrtab if needed.
	(ctf_add_encoded): Pass in the kind.
	(ctf_add_slice): Likewise.
	(ctf_add_array): Likewise.
	(ctf_add_function): Likewise.
	(ctf_add_typedef): Likewise.
	(ctf_add_reftype): Likewise. Initialize the ctf_ptrtab, checking
	ctt_name rather than dtd_name.
	(ctf_add_struct_sized): Pass in the kind.  Use
	ctf_lookup_by_rawname, not ctf_hash_lookup_type /
	ctf_dtd_lookup_type_by_name.
	(ctf_add_union_sized): Likewise.
	(ctf_add_enum): Likewise.
	(ctf_add_enum_encoded): Likewise.
	(ctf_add_forward): Likewise.
	(ctf_add_type): Likewise.
	(ctf_compress_write): Call ctf_serialize: adjust for ctf_size not
	being initialized until after the call.
	(ctf_write_mem): Likewise.
	(ctf_write): Likewise.
	* ctf-archive.c (arc_write_one_ctf): Likewise.
	* ctf-lookup.c (ctf_lookup_by_name): Use ctf_lookuup_by_rawhash, not
	ctf_hash_lookup_type.
	(ctf_lookup_by_id): No longer check the readonly types if the
	dictionary is writable.
	* ctf-open.c (init_types): Assert that this dictionary is not
	writable.  Adjust to use the new name hashes, ctf_name_table,
	and ctf_ptrtab_len.  GNU style fix for the final ptrtab scan.
	(ctf_bufopen_internal): New 'writable' parameter.  Flip on LCTF_RDWR
	if set.	 Drop out early when dictionary is writable.  Split the
	ctf_lookups initialization into...
	(ctf_set_cth_hashes): ... this new function.
	(ctf_simple_open_internal): Adjust.  New 'writable' parameter.
	(ctf_simple_open): Adjust accordingly.
	(ctf_bufopen): Likewise.
	(ctf_file_close): Destroy the appropriate name hashes.	No longer
	destroy ctf_dtbyname, which is gone.
	(ctf_getdatasect): Remove spurious "extern".
	* ctf-types.c (ctf_lookup_by_rawname): New, look up types in the
	specified name table, given a kind.
	(ctf_lookup_by_rawhash): Likewise, given a ctf_names_t *.
	(ctf_member_iter): Add support for iterating over the
	dynamic type list.
	(ctf_enum_iter): Likewise.
	(ctf_variable_iter): Likewise.
	(ctf_type_rvisit): Likewise.
	(ctf_member_info): Add support for types in the dynamic type list.
	(ctf_enum_name): Likewise.
	(ctf_enum_value): Likewise.
	(ctf_func_type_info): Likewise.
	(ctf_func_type_args): Likewise.
	* ctf-link.c (ctf_accumulate_archive_names): No longer call
	ctf_update.
	(ctf_link_write): Likewise.
	(ctf_link_intern_extern_string): Adjust for new
	ctf_str_add_external return value.
	(ctf_link_add_strtab): Likewise.
	* ctf-util.c (ctf_list_empty_p): New.
2019-10-03 17:04:56 +01:00

490 lines
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/* Implementation header.
Copyright (C) 2019 Free Software Foundation, Inc.
This file is part of libctf.
libctf is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not see
<http://www.gnu.org/licenses/>. */
#ifndef _CTF_IMPL_H
#define _CTF_IMPL_H
#include "config.h"
#include <errno.h>
#include <sys/param.h>
#include "ctf-decls.h"
#include <ctf-api.h>
#include <sys/types.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdint.h>
#include <limits.h>
#include <ctype.h>
#include <elf.h>
#include <bfd.h>
#ifdef __cplusplus
extern "C"
{
#endif
/* Compiler attributes. */
#if defined (__GNUC__)
/* GCC. We assume that all compilers claiming to be GCC support sufficiently
many GCC attributes that the code below works. If some non-GCC compilers
masquerading as GCC in fact do not implement these attributes, version checks
may be required. */
/* We use the _libctf_*_ pattern to avoid clashes with any future attribute
macros glibc may introduce, which have names of the pattern
__attribute_blah__. */
#define _libctf_printflike_(string_index,first_to_check) \
__attribute__ ((__format__ (__printf__, (string_index), (first_to_check))))
#define _libctf_unlikely_(x) __builtin_expect ((x), 0)
#define _libctf_unused_ __attribute__ ((__unused__))
#define _libctf_malloc_ __attribute__((__malloc__))
#endif
/* libctf in-memory state. */
typedef struct ctf_fixed_hash ctf_hash_t; /* Private to ctf-hash.c. */
typedef struct ctf_dynhash ctf_dynhash_t; /* Private to ctf-hash.c. */
typedef struct ctf_strs
{
const char *cts_strs; /* Base address of string table. */
size_t cts_len; /* Size of string table in bytes. */
} ctf_strs_t;
typedef struct ctf_strs_writable
{
char *cts_strs; /* Base address of string table. */
size_t cts_len; /* Size of string table in bytes. */
} ctf_strs_writable_t;
typedef struct ctf_dmodel
{
const char *ctd_name; /* Data model name. */
int ctd_code; /* Data model code. */
size_t ctd_pointer; /* Size of void * in bytes. */
size_t ctd_char; /* Size of char in bytes. */
size_t ctd_short; /* Size of short in bytes. */
size_t ctd_int; /* Size of int in bytes. */
size_t ctd_long; /* Size of long in bytes. */
} ctf_dmodel_t;
typedef struct ctf_names
{
ctf_hash_t *ctn_readonly; /* Hash table when readonly. */
ctf_dynhash_t *ctn_writable; /* Hash table when writable. */
} ctf_names_t;
typedef struct ctf_lookup
{
const char *ctl_prefix; /* String prefix for this lookup. */
size_t ctl_len; /* Length of prefix string in bytes. */
ctf_names_t *ctl_hash; /* Pointer to hash table for lookup. */
} ctf_lookup_t;
typedef struct ctf_fileops
{
uint32_t (*ctfo_get_kind) (uint32_t);
uint32_t (*ctfo_get_root) (uint32_t);
uint32_t (*ctfo_get_vlen) (uint32_t);
ssize_t (*ctfo_get_ctt_size) (const ctf_file_t *, const ctf_type_t *,
ssize_t *, ssize_t *);
ssize_t (*ctfo_get_vbytes) (unsigned short, ssize_t, size_t);
} ctf_fileops_t;
typedef struct ctf_list
{
struct ctf_list *l_prev; /* Previous pointer or tail pointer. */
struct ctf_list *l_next; /* Next pointer or head pointer. */
} ctf_list_t;
typedef enum
{
CTF_PREC_BASE,
CTF_PREC_POINTER,
CTF_PREC_ARRAY,
CTF_PREC_FUNCTION,
CTF_PREC_MAX
} ctf_decl_prec_t;
typedef struct ctf_decl_node
{
ctf_list_t cd_list; /* Linked list pointers. */
ctf_id_t cd_type; /* Type identifier. */
uint32_t cd_kind; /* Type kind. */
uint32_t cd_n; /* Type dimension if array. */
} ctf_decl_node_t;
typedef struct ctf_decl
{
ctf_list_t cd_nodes[CTF_PREC_MAX]; /* Declaration node stacks. */
int cd_order[CTF_PREC_MAX]; /* Storage order of decls. */
ctf_decl_prec_t cd_qualp; /* Qualifier precision. */
ctf_decl_prec_t cd_ordp; /* Ordered precision. */
char *cd_buf; /* Buffer for output. */
int cd_err; /* Saved error value. */
int cd_enomem; /* Nonzero if OOM during printing. */
} ctf_decl_t;
typedef struct ctf_dmdef
{
ctf_list_t dmd_list; /* List forward/back pointers. */
char *dmd_name; /* Name of this member. */
ctf_id_t dmd_type; /* Type of this member (for sou). */
unsigned long dmd_offset; /* Offset of this member in bits (for sou). */
int dmd_value; /* Value of this member (for enum). */
} ctf_dmdef_t;
typedef struct ctf_dtdef
{
ctf_list_t dtd_list; /* List forward/back pointers. */
ctf_id_t dtd_type; /* Type identifier for this definition. */
ctf_type_t dtd_data; /* Type node, including name. */
union
{
ctf_list_t dtu_members; /* struct, union, or enum */
ctf_arinfo_t dtu_arr; /* array */
ctf_encoding_t dtu_enc; /* integer or float */
ctf_id_t *dtu_argv; /* function */
ctf_slice_t dtu_slice; /* slice */
} dtd_u;
} ctf_dtdef_t;
typedef struct ctf_dvdef
{
ctf_list_t dvd_list; /* List forward/back pointers. */
char *dvd_name; /* Name associated with variable. */
ctf_id_t dvd_type; /* Type of variable. */
unsigned long dvd_snapshots; /* Snapshot count when inserted. */
} ctf_dvdef_t;
typedef struct ctf_bundle
{
ctf_file_t *ctb_file; /* CTF container handle. */
ctf_id_t ctb_type; /* CTF type identifier. */
ctf_dtdef_t *ctb_dtd; /* CTF dynamic type definition (if any). */
} ctf_bundle_t;
/* Atoms associate strings with a list of the CTF items that reference that
string, so that ctf_update() can instantiate all the strings using the
ctf_str_atoms and then reassociate them with the real string later.
Strings can be interned into ctf_str_atom without having refs associated
with them, for values that are returned to callers, etc. Items are only
removed from this table on ctf_close(), but on every ctf_update(), all the
csa_refs in all entries are purged. */
typedef struct ctf_str_atom
{
const char *csa_str; /* Backpointer to string (hash key). */
ctf_list_t csa_refs; /* This string's refs. */
uint32_t csa_offset; /* Strtab offset, if any. */
uint32_t csa_external_offset; /* External strtab offset, if any. */
unsigned long csa_snapshot_id; /* Snapshot ID at time of creation. */
} ctf_str_atom_t;
/* The refs of a single string in the atoms table. */
typedef struct ctf_str_atom_ref
{
ctf_list_t caf_list; /* List forward/back pointers. */
uint32_t *caf_ref; /* A single ref to this string. */
} ctf_str_atom_ref_t;
/* The structure used as the key in a ctf_link_type_mapping, which lets the
linker machinery determine which type IDs on the input side of a link map to
which types on the output side. (The value is a ctf_id_t: another
index, not a type.) */
typedef struct ctf_link_type_mapping_key
{
ctf_file_t *cltm_fp;
ctf_id_t cltm_idx;
} ctf_link_type_mapping_key_t;
/* The ctf_file is the structure used to represent a CTF container to library
clients, who see it only as an opaque pointer. Modifications can therefore
be made freely to this structure without regard to client versioning. The
ctf_file_t typedef appears in <ctf-api.h> and declares a forward tag.
NOTE: ctf_update() requires that everything inside of ctf_file either be an
immediate value, a pointer to dynamically allocated data *outside* of the
ctf_file itself, or a pointer to statically allocated data. If you add a
pointer to ctf_file that points to something within the ctf_file itself,
you must make corresponding changes to ctf_update(). */
struct ctf_file
{
const ctf_fileops_t *ctf_fileops; /* Version-specific file operations. */
struct ctf_header *ctf_header; /* The header from this CTF file. */
unsigned char ctf_openflags; /* Flags the file had when opened. */
ctf_sect_t ctf_data; /* CTF data from object file. */
ctf_sect_t ctf_symtab; /* Symbol table from object file. */
ctf_sect_t ctf_strtab; /* String table from object file. */
ctf_dynhash_t *ctf_prov_strtab; /* Maps provisional-strtab offsets
to names. */
ctf_dynhash_t *ctf_syn_ext_strtab; /* Maps ext-strtab offsets to names. */
void *ctf_data_mmapped; /* CTF data we mmapped, to free later. */
size_t ctf_data_mmapped_len; /* Length of CTF data we mmapped. */
ctf_names_t ctf_structs; /* Hash table of struct types. */
ctf_names_t ctf_unions; /* Hash table of union types. */
ctf_names_t ctf_enums; /* Hash table of enum types. */
ctf_names_t ctf_names; /* Hash table of remaining type names. */
ctf_lookup_t ctf_lookups[5]; /* Pointers to nametabs for name lookup. */
ctf_strs_t ctf_str[2]; /* Array of string table base and bounds. */
ctf_dynhash_t *ctf_str_atoms; /* Hash table of ctf_str_atoms_t. */
uint64_t ctf_str_num_refs; /* Number of refs to cts_str_atoms. */
uint32_t ctf_str_prov_offset; /* Latest provisional offset assigned so far. */
unsigned char *ctf_base; /* CTF file pointer. */
unsigned char *ctf_dynbase; /* Freeable CTF file pointer. */
unsigned char *ctf_buf; /* Uncompressed CTF data buffer. */
size_t ctf_size; /* Size of CTF header + uncompressed data. */
uint32_t *ctf_sxlate; /* Translation table for symtab entries. */
unsigned long ctf_nsyms; /* Number of entries in symtab xlate table. */
uint32_t *ctf_txlate; /* Translation table for type IDs. */
uint32_t *ctf_ptrtab; /* Translation table for pointer-to lookups. */
size_t ctf_ptrtab_len; /* Num types storable in ptrtab currently. */
struct ctf_varent *ctf_vars; /* Sorted variable->type mapping. */
unsigned long ctf_nvars; /* Number of variables in ctf_vars. */
unsigned long ctf_typemax; /* Maximum valid type ID number. */
const ctf_dmodel_t *ctf_dmodel; /* Data model pointer (see above). */
const char *ctf_cuname; /* Compilation unit name (if any). */
char *ctf_dyncuname; /* Dynamically allocated name of CU. */
struct ctf_file *ctf_parent; /* Parent CTF container (if any). */
const char *ctf_parlabel; /* Label in parent container (if any). */
const char *ctf_parname; /* Basename of parent (if any). */
char *ctf_dynparname; /* Dynamically allocated name of parent. */
uint32_t ctf_parmax; /* Highest type ID of a parent type. */
uint32_t ctf_refcnt; /* Reference count (for parent links). */
uint32_t ctf_flags; /* Libctf flags (see below). */
int ctf_errno; /* Error code for most recent error. */
int ctf_version; /* CTF data version. */
ctf_dynhash_t *ctf_dthash; /* Hash of dynamic type definitions. */
ctf_list_t ctf_dtdefs; /* List of dynamic type definitions. */
ctf_dynhash_t *ctf_dvhash; /* Hash of dynamic variable mappings. */
ctf_list_t ctf_dvdefs; /* List of dynamic variable definitions. */
unsigned long ctf_dtoldid; /* Oldest id that has been committed. */
unsigned long ctf_snapshots; /* ctf_snapshot() plus ctf_update() count. */
unsigned long ctf_snapshot_lu; /* ctf_snapshot() call count at last update. */
ctf_archive_t *ctf_archive; /* Archive this ctf_file_t came from. */
ctf_dynhash_t *ctf_link_inputs; /* Inputs to this link. */
ctf_dynhash_t *ctf_link_outputs; /* Additional outputs from this link. */
ctf_dynhash_t *ctf_link_type_mapping; /* Map input types to output types. */
ctf_dynhash_t *ctf_link_cu_mapping; /* Map CU names to CTF dict names. */
/* Allow the caller to Change the name of link archive members. */
ctf_link_memb_name_changer_f *ctf_link_memb_name_changer;
void *ctf_link_memb_name_changer_arg; /* Argument for it. */
char *ctf_tmp_typeslice; /* Storage for slicing up type names. */
size_t ctf_tmp_typeslicelen; /* Size of the typeslice. */
void *ctf_specific; /* Data for ctf_get/setspecific(). */
};
/* An abstraction over both a ctf_file_t and a ctf_archive_t. */
struct ctf_archive_internal
{
int ctfi_is_archive;
ctf_file_t *ctfi_file;
struct ctf_archive *ctfi_archive;
ctf_sect_t ctfi_symsect;
ctf_sect_t ctfi_strsect;
void *ctfi_data;
bfd *ctfi_abfd; /* Optional source of section data. */
void (*ctfi_bfd_close) (struct ctf_archive_internal *);
};
/* Return x rounded up to an alignment boundary.
eg, P2ROUNDUP(0x1234, 0x100) == 0x1300 (0x13*align)
eg, P2ROUNDUP(0x5600, 0x100) == 0x5600 (0x56*align) */
#define P2ROUNDUP(x, align) (-(-(x) & -(align)))
/* * If an offs is not aligned already then round it up and align it. */
#define LCTF_ALIGN_OFFS(offs, align) ((offs + (align - 1)) & ~(align - 1))
#define LCTF_TYPE_ISPARENT(fp, id) ((id) <= fp->ctf_parmax)
#define LCTF_TYPE_ISCHILD(fp, id) ((id) > fp->ctf_parmax)
#define LCTF_TYPE_TO_INDEX(fp, id) ((id) & (fp->ctf_parmax))
#define LCTF_INDEX_TO_TYPE(fp, id, child) (child ? ((id) | (fp->ctf_parmax+1)) : \
(id))
#define LCTF_INDEX_TO_TYPEPTR(fp, i) \
((fp->ctf_flags & LCTF_RDWR) ? \
&(ctf_dtd_lookup (fp, LCTF_INDEX_TO_TYPE \
(fp, i, fp->ctf_flags & LCTF_CHILD))->dtd_data) : \
(ctf_type_t *)((uintptr_t)(fp)->ctf_buf + (fp)->ctf_txlate[(i)]))
#define LCTF_INFO_KIND(fp, info) ((fp)->ctf_fileops->ctfo_get_kind(info))
#define LCTF_INFO_ISROOT(fp, info) ((fp)->ctf_fileops->ctfo_get_root(info))
#define LCTF_INFO_VLEN(fp, info) ((fp)->ctf_fileops->ctfo_get_vlen(info))
#define LCTF_VBYTES(fp, kind, size, vlen) \
((fp)->ctf_fileops->ctfo_get_vbytes(kind, size, vlen))
static inline ssize_t ctf_get_ctt_size (const ctf_file_t *fp,
const ctf_type_t *tp,
ssize_t *sizep,
ssize_t *incrementp)
{
return (fp->ctf_fileops->ctfo_get_ctt_size (fp, tp, sizep, incrementp));
}
#define LCTF_CHILD 0x0001 /* CTF container is a child */
#define LCTF_RDWR 0x0002 /* CTF container is writable */
#define LCTF_DIRTY 0x0004 /* CTF container has been modified */
extern ctf_names_t *ctf_name_table (ctf_file_t *, int);
extern const ctf_type_t *ctf_lookup_by_id (ctf_file_t **, ctf_id_t);
extern ctf_id_t ctf_lookup_by_rawname (ctf_file_t *, int, const char *);
extern ctf_id_t ctf_lookup_by_rawhash (ctf_file_t *, ctf_names_t *, const char *);
extern void ctf_set_ctl_hashes (ctf_file_t *);
typedef unsigned int (*ctf_hash_fun) (const void *ptr);
extern unsigned int ctf_hash_integer (const void *ptr);
extern unsigned int ctf_hash_string (const void *ptr);
extern unsigned int ctf_hash_type_mapping_key (const void *ptr);
typedef int (*ctf_hash_eq_fun) (const void *, const void *);
extern int ctf_hash_eq_integer (const void *, const void *);
extern int ctf_hash_eq_string (const void *, const void *);
extern int ctf_hash_eq_type_mapping_key (const void *, const void *);
typedef void (*ctf_hash_free_fun) (void *);
typedef void (*ctf_hash_iter_f) (void *key, void *value, void *arg);
typedef int (*ctf_hash_iter_remove_f) (void *key, void *value, void *arg);
extern ctf_hash_t *ctf_hash_create (unsigned long, ctf_hash_fun, ctf_hash_eq_fun);
extern int ctf_hash_insert_type (ctf_hash_t *, ctf_file_t *, uint32_t, uint32_t);
extern int ctf_hash_define_type (ctf_hash_t *, ctf_file_t *, uint32_t, uint32_t);
extern ctf_id_t ctf_hash_lookup_type (ctf_hash_t *, ctf_file_t *, const char *);
extern uint32_t ctf_hash_size (const ctf_hash_t *);
extern void ctf_hash_destroy (ctf_hash_t *);
extern ctf_dynhash_t *ctf_dynhash_create (ctf_hash_fun, ctf_hash_eq_fun,
ctf_hash_free_fun, ctf_hash_free_fun);
extern int ctf_dynhash_insert (ctf_dynhash_t *, void *, void *);
extern void ctf_dynhash_remove (ctf_dynhash_t *, const void *);
extern void ctf_dynhash_empty (ctf_dynhash_t *);
extern void *ctf_dynhash_lookup (ctf_dynhash_t *, const void *);
extern void ctf_dynhash_destroy (ctf_dynhash_t *);
extern void ctf_dynhash_iter (ctf_dynhash_t *, ctf_hash_iter_f, void *);
extern void ctf_dynhash_iter_remove (ctf_dynhash_t *, ctf_hash_iter_remove_f,
void *);
#define ctf_list_prev(elem) ((void *)(((ctf_list_t *)(elem))->l_prev))
#define ctf_list_next(elem) ((void *)(((ctf_list_t *)(elem))->l_next))
extern void ctf_list_append (ctf_list_t *, void *);
extern void ctf_list_prepend (ctf_list_t *, void *);
extern void ctf_list_delete (ctf_list_t *, void *);
extern int ctf_list_empty_p (ctf_list_t *lp);
extern int ctf_dtd_insert (ctf_file_t *, ctf_dtdef_t *, int);
extern void ctf_dtd_delete (ctf_file_t *, ctf_dtdef_t *);
extern ctf_dtdef_t *ctf_dtd_lookup (const ctf_file_t *, ctf_id_t);
extern ctf_dtdef_t *ctf_dynamic_type (const ctf_file_t *, ctf_id_t);
extern int ctf_dvd_insert (ctf_file_t *, ctf_dvdef_t *);
extern void ctf_dvd_delete (ctf_file_t *, ctf_dvdef_t *);
extern ctf_dvdef_t *ctf_dvd_lookup (const ctf_file_t *, const char *);
extern void ctf_add_type_mapping (ctf_file_t *src_fp, ctf_id_t src_type,
ctf_file_t *dst_fp, ctf_id_t dst_type);
extern ctf_id_t ctf_type_mapping (ctf_file_t *src_fp, ctf_id_t src_type,
ctf_file_t **dst_fp);
extern void ctf_decl_init (ctf_decl_t *);
extern void ctf_decl_fini (ctf_decl_t *);
extern void ctf_decl_push (ctf_decl_t *, ctf_file_t *, ctf_id_t);
_libctf_printflike_ (2, 3)
extern void ctf_decl_sprintf (ctf_decl_t *, const char *, ...);
extern char *ctf_decl_buf (ctf_decl_t *cd);
extern const char *ctf_strptr (ctf_file_t *, uint32_t);
extern const char *ctf_strraw (ctf_file_t *, uint32_t);
extern const char *ctf_strraw_explicit (ctf_file_t *, uint32_t,
ctf_strs_t *);
extern int ctf_str_create_atoms (ctf_file_t *);
extern void ctf_str_free_atoms (ctf_file_t *);
extern uint32_t ctf_str_add (ctf_file_t *, const char *);
extern uint32_t ctf_str_add_ref (ctf_file_t *, const char *, uint32_t *ref);
extern int ctf_str_add_external (ctf_file_t *, const char *, uint32_t offset);
extern void ctf_str_remove_ref (ctf_file_t *, const char *, uint32_t *ref);
extern void ctf_str_rollback (ctf_file_t *, ctf_snapshot_id_t);
extern void ctf_str_purge_refs (ctf_file_t *);
extern ctf_strs_writable_t ctf_str_write_strtab (ctf_file_t *);
extern struct ctf_archive *ctf_arc_open_internal (const char *, int *);
extern struct ctf_archive *ctf_arc_bufopen (const void *, size_t, int *);
extern void ctf_arc_close_internal (struct ctf_archive *);
extern void *ctf_set_open_errno (int *, int);
extern unsigned long ctf_set_errno (ctf_file_t *, int);
extern ctf_file_t *ctf_simple_open_internal (const char *, size_t, const char *,
size_t, size_t,
const char *, size_t,
ctf_dynhash_t *, int, int *);
extern ctf_file_t *ctf_bufopen_internal (const ctf_sect_t *, const ctf_sect_t *,
const ctf_sect_t *, ctf_dynhash_t *,
int, int *);
extern int ctf_serialize (ctf_file_t *);
_libctf_malloc_
extern void *ctf_mmap (size_t length, size_t offset, int fd);
extern void ctf_munmap (void *, size_t);
extern ssize_t ctf_pread (int fd, void *buf, ssize_t count, off_t offset);
_libctf_malloc_
extern void *ctf_alloc (size_t);
extern void ctf_free (void *);
extern void *ctf_realloc (ctf_file_t *, void *, size_t);
_libctf_malloc_
extern char *ctf_strdup (const char *);
extern char *ctf_str_append (char *, const char *);
extern const char *ctf_strerror (int);
extern ctf_id_t ctf_type_resolve_unsliced (ctf_file_t *, ctf_id_t);
extern int ctf_type_kind_unsliced (ctf_file_t *, ctf_id_t);
_libctf_printflike_ (1, 2)
extern void ctf_dprintf (const char *, ...);
extern void libctf_init_debug (void);
extern Elf64_Sym *ctf_sym_to_elf64 (const Elf32_Sym *src, Elf64_Sym *dst);
extern const char *ctf_lookup_symbol_name (ctf_file_t *fp, unsigned long symidx);
/* Variables, all underscore-prepended. */
extern const char _CTF_SECTION[]; /* name of CTF ELF section */
extern const char _CTF_NULLSTR[]; /* empty string */
extern int _libctf_version; /* library client version */
extern int _libctf_debug; /* debugging messages enabled */
#ifdef __cplusplus
}
#endif
#endif /* _CTF_IMPL_H */
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