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binutils-gdb/libctf/ctf-impl.h
Nick Alcock 1fa7a0c24e libctf: sort out potential refcount loops 
When you link TUs that contain conflicting types together, the resulting
CTF section is an archive containing many CTF dicts.  These dicts appear
in ctf_link_outputs of the shared dict, with each ctf_import'ing that
shared dict.  ctf_importing a dict bumps its refcount to stop it going
away while it's in use -- but if the shared dict (whose refcount is
bumped) has the child dict (doing the bumping) in its ctf_link_outputs,
we have a refcount loop, since the child dict only un-ctf_imports and
drops the parent's refcount when it is freed, but the child is only
freed when the parent's refcount falls to zero.

(In the future, this will be able to go wrong on the inputs too, when an
ld -r'ed deduplicated output with conflicts is relinked.  Right now this
cannot happen because we don't ctf_import such dicts at all.  This will
be fixed in a later commit in this series.)

Fix this by introducing an internal-use-only ctf_import_unref function
that imports a parent dict *witthout* bumping the parent's refcount, and
using it when we create per-CU outputs.  This function is only safe to
use if you know the parent cannot go away while the child exists: but if
the parent *owns* the child, as here, this is necessarily true.

Record in the ctf_file_t whether a parent was imported via ctf_import or
ctf_import_unref, so that if you do another ctf_import later on (or a
ctf_import_unref) it can decide whether to drop the refcount of the
existing parent being replaced depending on which function you used to
import that one.  Adjust ctf_serialize so that rather than doing a
ctf_import (which is wrong if the original import was
ctf_import_unref'fed), we just copy the parent field and refcount over
and forcibly flip the unref flag on on the old copy we are going to
discard.

ctf_file_close also needs a bit of tweaking to only close the parent if
it was not imported with ctf_import_unref: while we're at it, guard
against repeated closes with a refcount of zero and stop them causing
double-frees, even if destruction of things freed *inside*
ctf_file_close cause such recursion.

Verified no leaks or accesses to freed memory after all of this with
valgrind.  (It was leak-happy before.)

libctf/
	* ctf-impl.c (ctf_file_t) <ctf_parent_unreffed>: New.
	(ctf_import_unref): New.
	* ctf-open.c (ctf_file_close) Drop the refcount all the way to
	zero.  Don't recurse back in if the refcount is already zero.
	(ctf_import): Check ctf_parent_unreffed before deciding whether
	to close a pre-existing parent.  Set it to zero.
	(ctf_import_unreffed): New, as above, setting
	ctf_parent_unreffed to 1.
	* ctf-create.c (ctf_serialize): Do not ctf_import into the new
	child: use direct assignment, and set unreffed on the new and
	old children.
	* ctf-link.c (ctf_create_per_cu): Import the parent using
	ctf_import_unreffed.
2020-07-22 18:02:18 +01:00

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/* Implementation header.
Copyright (C) 2019-2020 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>
#include "hashtab.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__))
#else
#define _libctf_printflike_(string_index,first_to_check)
#define _libctf_unlikely_(x) (x)
#define _libctf_unused_
#define _libctf_malloc_
#define __extension__
#endif
#define ctf_assert(fp, expr) \
_libctf_unlikely_ (ctf_assert_internal (fp, __FILE__, __LINE__, \
#expr, !!(expr)))
/* 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_dynset ctf_dynset_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 */
uint32_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;
typedef struct ctf_err_warning
{
ctf_list_t cew_list; /* List forward/back pointers. */
int cew_is_warning; /* 1 if warning, 0 if error. */
char *cew_text; /* Error/warning text. */
} ctf_err_warning_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. The value is a
type index, not a type ID. */
typedef struct ctf_link_type_key
{
ctf_file_t *cltk_fp;
ctf_id_t cltk_idx;
} ctf_link_type_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). */
int ctf_parent_unreffed; /* Parent set by ctf_import_unref? */
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_list_t ctf_errs_warnings; /* CTF errors and warnings. */
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. */
ctf_dynhash_t *ctf_add_processing; /* Types ctf_add_type is working on now. */
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;
int ctfi_unmap_on_close;
ctf_file_t *ctfi_file;
struct ctf_archive *ctfi_archive;
ctf_sect_t ctfi_symsect;
ctf_sect_t ctfi_strsect;
int ctfi_free_symsect;
int ctfi_free_strsect;
void *ctfi_data;
bfd *ctfi_abfd; /* Optional source of section data. */
void (*ctfi_bfd_close) (struct ctf_archive_internal *);
};
/* Iterator state for the *_next() functions. */
/* A single hash key/value pair. */
typedef struct ctf_next_hkv
{
void *hkv_key;
void *hkv_value;
} ctf_next_hkv_t;
struct ctf_next
{
void (*ctn_iter_fun) (void);
ctf_id_t ctn_type;
ssize_t ctn_size;
ssize_t ctn_increment;
uint32_t ctn_n;
/* We can save space on this side of things by noting that a container is
either dynamic or not, as a whole, and a given iterator can only iterate
over one kind of thing at once: so we can overlap the DTD and non-DTD
members, and the structure, variable and enum members, etc. */
union
{
const ctf_member_t *ctn_mp;
const ctf_lmember_t *ctn_lmp;
const ctf_dmdef_t *ctn_dmd;
const ctf_enum_t *ctn_en;
const ctf_dvdef_t *ctn_dvd;
ctf_next_hkv_t *ctn_sorted_hkv;
void **ctn_hash_slot;
} u;
/* This union is of various sorts of container we can iterate over:
currently dictionaries and archives, dynhashes, and dynsets. */
union
{
const ctf_file_t *ctn_fp;
const ctf_archive_t *ctn_arc;
const ctf_dynhash_t *ctn_h;
const ctf_dynset_t *ctn_s;
} cu;
};
/* 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))
#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 *);
extern ctf_file_t *ctf_get_dict (ctf_file_t *fp, ctf_id_t type);
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_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_key (const void *, const void *);
extern int ctf_dynset_eq_string (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);
typedef int (*ctf_hash_iter_find_f) (void *key, void *value, void *arg);
typedef int (*ctf_hash_sort_f) (const ctf_next_hkv_t *, const ctf_next_hkv_t *,
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 size_t ctf_dynhash_elements (ctf_dynhash_t *);
extern void ctf_dynhash_empty (ctf_dynhash_t *);
extern void *ctf_dynhash_lookup (ctf_dynhash_t *, const void *);
extern int ctf_dynhash_lookup_kv (ctf_dynhash_t *, const void *key,
const void **orig_key, void **value);
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 *);
extern void *ctf_dynhash_iter_find (ctf_dynhash_t *, ctf_hash_iter_find_f,
void *);
extern int ctf_dynhash_next (ctf_dynhash_t *, ctf_next_t **,
void **key, void **value);
extern int ctf_dynhash_next_sorted (ctf_dynhash_t *, ctf_next_t **,
void **key, void **value, ctf_hash_sort_f,
void *);
extern ctf_dynset_t *ctf_dynset_create (htab_hash, htab_eq, ctf_hash_free_fun);
extern int ctf_dynset_insert (ctf_dynset_t *, void *);
extern void ctf_dynset_remove (ctf_dynset_t *, const void *);
extern void ctf_dynset_destroy (ctf_dynset_t *);
extern void *ctf_dynset_lookup (ctf_dynset_t *, const void *);
extern int ctf_dynset_exists (ctf_dynset_t *, const void *key,
const void **orig_key);
extern int ctf_dynset_next (ctf_dynset_t *, ctf_next_t **, void **key);
extern void *ctf_dynset_lookup_any (ctf_dynset_t *);
#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 flag, int kind);
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_internal *
ctf_new_archive_internal (int is_archive, int unmap_on_close,
struct ctf_archive *, ctf_file_t *,
const ctf_sect_t *symsect,
const ctf_sect_t *strsect, int *errp);
extern struct ctf_archive *ctf_arc_open_internal (const char *, 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_import_unref (ctf_file_t *fp, ctf_file_t *pfp);
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);
extern void *ctf_realloc (ctf_file_t *, void *, size_t);
extern char *ctf_str_append (char *, const char *);
extern char *ctf_str_append_noerr (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);
_libctf_printflike_ (3, 4)
extern void ctf_err_warn (ctf_file_t *, int is_warning, const char *, ...);
extern void ctf_assert_fail_internal (ctf_file_t *, const char *,
size_t, const char *);
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 */
#include "ctf-inlines.h"
#ifdef __cplusplus
}
#endif
#endif /* _CTF_IMPL_H */
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