diff options
Diffstat (limited to 'libctf')
| -rw-r--r-- | libctf/ctf-create.c | 2 | ||||
| -rw-r--r-- | libctf/ctf-impl.h | 9 | ||||
| -rw-r--r-- | libctf/ctf-open.c | 20 | ||||
| -rw-r--r-- | libctf/ctf-serialize.c | 22 | ||||
| -rw-r--r-- | libctf/ctf-string.c | 389 |
5 files changed, 292 insertions, 150 deletions
diff --git a/libctf/ctf-create.c b/libctf/ctf-create.c index e0558d2..78fb030 100644 --- a/libctf/ctf-create.c +++ b/libctf/ctf-create.c @@ -133,7 +133,7 @@ ctf_create (int *errp) cts.cts_size = sizeof (hdr); cts.cts_entsize = 1; - if ((fp = ctf_bufopen_internal (&cts, NULL, NULL, NULL, errp)) == NULL) + if ((fp = ctf_bufopen_internal (&cts, NULL, NULL, NULL, NULL, errp)) == NULL) goto err; /* These hashes will have been initialized with a starting size of zero, diff --git a/libctf/ctf-impl.h b/libctf/ctf-impl.h index f461131..3eef232 100644 --- a/libctf/ctf-impl.h +++ b/libctf/ctf-impl.h @@ -396,6 +396,7 @@ struct ctf_dict ctf_dynhash_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_strs_writable_t *ctf_dynstrtab; /* Dynamically allocated string table, if any. */ ctf_dynhash_t *ctf_str_atoms; /* Hash table of ctf_str_atoms_t. */ ctf_dynhash_t *ctf_str_movable_refs; /* Hash table of void * -> ctf_str_atom_ref_t. */ uint32_t ctf_str_prov_offset; /* Latest provisional offset assigned so far. */ @@ -734,7 +735,7 @@ extern const char *ctf_strraw (ctf_dict_t *, uint32_t); extern const char *ctf_strraw_explicit (ctf_dict_t *, uint32_t, ctf_strs_t *); extern const char *ctf_strptr_validate (ctf_dict_t *, uint32_t); -extern int ctf_str_create_atoms (ctf_dict_t *); +extern int ctf_str_create_atoms (ctf_dict_t *, ctf_dynhash_t *atoms); extern void ctf_str_free_atoms (ctf_dict_t *); extern uint32_t ctf_str_add (ctf_dict_t *, const char *); extern uint32_t ctf_str_add_ref (ctf_dict_t *, const char *, uint32_t *ref); @@ -745,7 +746,7 @@ extern int ctf_str_add_external (ctf_dict_t *, const char *, uint32_t offset); extern void ctf_str_remove_ref (ctf_dict_t *, const char *, uint32_t *ref); extern void ctf_str_rollback (ctf_dict_t *, ctf_snapshot_id_t); extern void ctf_str_purge_refs (ctf_dict_t *); -extern ctf_strs_writable_t ctf_str_write_strtab (ctf_dict_t *); +extern const ctf_strs_writable_t *ctf_str_write_strtab (ctf_dict_t *); extern struct ctf_archive_internal * ctf_new_archive_internal (int is_archive, int unmap_on_close, @@ -762,10 +763,10 @@ extern int ctf_flip (ctf_dict_t *, ctf_header_t *, unsigned char *, int); extern ctf_dict_t *ctf_simple_open_internal (const char *, size_t, const char *, size_t, size_t, const char *, size_t, - ctf_dynhash_t *, int *); + ctf_dynhash_t *, ctf_dynhash_t *, int *); extern ctf_dict_t *ctf_bufopen_internal (const ctf_sect_t *, const ctf_sect_t *, const ctf_sect_t *, ctf_dynhash_t *, - int *); + ctf_dynhash_t *, int *); extern int ctf_import_unref (ctf_dict_t *fp, ctf_dict_t *pfp); extern int ctf_serialize (ctf_dict_t *); diff --git a/libctf/ctf-open.c b/libctf/ctf-open.c index 2247546..6d7a276 100644 --- a/libctf/ctf-open.c +++ b/libctf/ctf-open.c @@ -1290,7 +1290,7 @@ ctf_dict_t *ctf_simple_open (const char *ctfsect, size_t ctfsect_size, { return ctf_simple_open_internal (ctfsect, ctfsect_size, symsect, symsect_size, symsect_entsize, strsect, strsect_size, NULL, - errp); + NULL, errp); } /* Open a CTF file, mocking up a suitable ctf_sect and overriding the external @@ -1300,7 +1300,8 @@ ctf_dict_t *ctf_simple_open_internal (const char *ctfsect, size_t ctfsect_size, const char *symsect, size_t symsect_size, size_t symsect_entsize, const char *strsect, size_t strsect_size, - ctf_dynhash_t *syn_strtab, int *errp) + ctf_dynhash_t *syn_strtab, + ctf_dynhash_t *atoms, int *errp) { ctf_sect_t skeleton; @@ -1338,7 +1339,7 @@ ctf_dict_t *ctf_simple_open_internal (const char *ctfsect, size_t ctfsect_size, } return ctf_bufopen_internal (ctfsectp, symsectp, strsectp, syn_strtab, - errp); + atoms, errp); } /* Decode the specified CTF buffer and optional symbol table, and create a new @@ -1350,7 +1351,7 @@ ctf_dict_t * ctf_bufopen (const ctf_sect_t *ctfsect, const ctf_sect_t *symsect, const ctf_sect_t *strsect, int *errp) { - return ctf_bufopen_internal (ctfsect, symsect, strsect, NULL, errp); + return ctf_bufopen_internal (ctfsect, symsect, strsect, NULL, NULL, errp); } /* Like ctf_bufopen, but overriding the external strtab with a synthetic one. */ @@ -1358,7 +1359,7 @@ ctf_bufopen (const ctf_sect_t *ctfsect, const ctf_sect_t *symsect, ctf_dict_t * ctf_bufopen_internal (const ctf_sect_t *ctfsect, const ctf_sect_t *symsect, const ctf_sect_t *strsect, ctf_dynhash_t *syn_strtab, - int *errp) + ctf_dynhash_t *atoms, int *errp) { const ctf_preamble_t *pp; size_t hdrsz = sizeof (ctf_header_t); @@ -1615,7 +1616,14 @@ ctf_bufopen_internal (const ctf_sect_t *ctfsect, const ctf_sect_t *symsect, ctf_set_base(). */ ctf_set_version (fp, hp, hp->cth_version); - if (ctf_str_create_atoms (fp) < 0) + + /* Temporary assignment, just enough to be able to initialize + the atoms table. */ + + fp->ctf_str[CTF_STRTAB_0].cts_strs = (const char *) fp->ctf_buf + + hp->cth_stroff; + fp->ctf_str[CTF_STRTAB_0].cts_len = hp->cth_strlen; + if (ctf_str_create_atoms (fp, atoms) < 0) { err = ENOMEM; goto bad; diff --git a/libctf/ctf-serialize.c b/libctf/ctf-serialize.c index 6355d42..82e5b7d 100644 --- a/libctf/ctf-serialize.c +++ b/libctf/ctf-serialize.c @@ -955,7 +955,7 @@ ctf_serialize (ctf_dict_t *fp) ctf_header_t hdr, *hdrp; ctf_dvdef_t *dvd; ctf_varent_t *dvarents; - ctf_strs_writable_t strtab; + const ctf_strs_writable_t *strtab; int err; int sym_functions = 0; @@ -1090,36 +1090,34 @@ ctf_serialize (ctf_dict_t *fp) assert (t == (unsigned char *) buf + sizeof (ctf_header_t) + hdr.cth_stroff); /* Construct the final string table and fill out all the string refs with the - final offsets. Then purge the refs list, because we're about to move this - strtab onto the end of the buf, invalidating all the offsets. */ + final offsets. */ + strtab = ctf_str_write_strtab (fp); - ctf_str_purge_refs (fp); - if (strtab.cts_strs == NULL) + if (strtab == NULL) goto oom; /* Now the string table is constructed, we can sort the buffer of ctf_varent_t's. */ - ctf_sort_var_arg_cb_t sort_var_arg = { fp, (ctf_strs_t *) &strtab }; + ctf_sort_var_arg_cb_t sort_var_arg = { fp, (ctf_strs_t *) strtab }; ctf_qsort_r (dvarents, nvars, sizeof (ctf_varent_t), ctf_sort_var, &sort_var_arg); - if ((newbuf = realloc (buf, buf_size + strtab.cts_len)) == NULL) + if ((newbuf = realloc (buf, buf_size + strtab->cts_len)) == NULL) goto oom; buf = newbuf; - memcpy (buf + buf_size, strtab.cts_strs, strtab.cts_len); + memcpy (buf + buf_size, strtab->cts_strs, strtab->cts_len); hdrp = (ctf_header_t *) buf; - hdrp->cth_strlen = strtab.cts_len; + hdrp->cth_strlen = strtab->cts_len; buf_size += hdrp->cth_strlen; - free (strtab.cts_strs); /* Finally, we are ready to ctf_simple_open() the new dict. If this is successful, we then switch nfp and fp and free the old dict. */ if ((nfp = ctf_simple_open_internal ((char *) buf, buf_size, NULL, 0, 0, NULL, 0, fp->ctf_syn_ext_strtab, - &err)) == NULL) + fp->ctf_str_atoms, &err)) == NULL) { free (buf); return (ctf_set_errno (fp, err)); @@ -1189,9 +1187,11 @@ ctf_serialize (ctf_dict_t *fp) ctf_str_free_atoms (nfp); nfp->ctf_str_atoms = fp->ctf_str_atoms; nfp->ctf_prov_strtab = fp->ctf_prov_strtab; + nfp->ctf_dynstrtab = fp->ctf_dynstrtab; nfp->ctf_str_movable_refs = fp->ctf_str_movable_refs; fp->ctf_str_atoms = NULL; fp->ctf_prov_strtab = NULL; + fp->ctf_dynstrtab = NULL; fp->ctf_str_movable_refs = NULL; memset (&fp->ctf_dtdefs, 0, sizeof (ctf_list_t)); memset (&fp->ctf_errs_warnings, 0, sizeof (ctf_list_t)); diff --git a/libctf/ctf-string.c b/libctf/ctf-string.c index dcb8bf0..46b984b 100644 --- a/libctf/ctf-string.c +++ b/libctf/ctf-string.c @@ -20,10 +20,14 @@ #include <assert.h> #include <ctf-impl.h> #include <string.h> -#include <assert.h> -/* Convert an encoded CTF string name into a pointer to a C string, using an - explicit internal strtab rather than the fp-based one. */ +static ctf_str_atom_t * +ctf_str_add_ref_internal (ctf_dict_t *fp, const char *str, + int flags, uint32_t *ref); + +/* Convert an encoded CTF string name into a pointer to a C string, possibly + using an explicit internal provisional strtab rather than the fp-based + one. */ const char * ctf_strraw_explicit (ctf_dict_t *fp, uint32_t name, ctf_strs_t *strtab) { @@ -32,18 +36,20 @@ ctf_strraw_explicit (ctf_dict_t *fp, uint32_t name, ctf_strs_t *strtab) if ((CTF_NAME_STID (name) == CTF_STRTAB_0) && (strtab != NULL)) ctsp = strtab; - /* If this name is in the external strtab, and there is a synthetic strtab, - use it in preference. */ + /* If this name is in the external strtab, and there is a synthetic + strtab, use it in preference. (This is used to add the set of strings + -- symbol names, etc -- the linker knows about before the strtab is + written out.) */ if (CTF_NAME_STID (name) == CTF_STRTAB_1 && fp->ctf_syn_ext_strtab != NULL) return ctf_dynhash_lookup (fp->ctf_syn_ext_strtab, (void *) (uintptr_t) name); - /* If the name is in the internal strtab, and the offset is beyond the end of - the ctsp->cts_len but below the ctf_str_prov_offset, this is a provisional - string added by ctf_str_add*() but not yet built into a real strtab: get - the value out of the ctf_prov_strtab. */ + /* If the name is in the internal strtab, and the name offset is beyond + the end of the ctsp->cts_len but below the ctf_str_prov_offset, this is + a provisional string added by ctf_str_add*() but not yet built into a + real strtab: get the value out of the ctf_prov_strtab. */ if (CTF_NAME_STID (name) == CTF_STRTAB_0 && name >= ctsp->cts_len && name < fp->ctf_str_prov_offset) @@ -134,13 +140,25 @@ ctf_str_free_atom (void *a) } /* Create the atoms table. There is always at least one atom in it, the null - string. */ + string: but also pull in atoms from the internal strtab. (We rely on + calls to ctf_str_add_external to populate external strtab entries, since + these are often not quite the same as what appears in any external + strtab, and the external strtab is often huge and best not aggressively + pulled in.) + + Alternatively, if passed, populate atoms from the passed-in table, but do + not propagate their flags or refs: they are all non-freeable and + non-movable. (This is used when serializing a dict: this entire atoms + table will be thrown away shortly, so it is important that we not create + any new strings.) */ int -ctf_str_create_atoms (ctf_dict_t *fp) +ctf_str_create_atoms (ctf_dict_t *fp, ctf_dynhash_t *atoms) { + size_t i; + fp->ctf_str_atoms = ctf_dynhash_create (ctf_hash_string, ctf_hash_eq_string, - free, ctf_str_free_atom); - if (fp->ctf_str_atoms == NULL) + NULL, ctf_str_free_atom); + if (!fp->ctf_str_atoms) return -ENOMEM; if (!fp->ctf_prov_strtab) @@ -161,6 +179,63 @@ ctf_str_create_atoms (ctf_dict_t *fp) if (errno == ENOMEM) goto oom_str_add; + /* Serializing. We have existing strings in an existing atoms table with + possibly-live pointers to them which must be used unchanged. Import + them into this atoms table. */ + + if (atoms) + { + ctf_next_t *it = NULL; + void *k, *v; + int err; + + while ((err = ctf_dynhash_next (atoms, &it, &k, &v)) == 0) + { + ctf_str_atom_t *existing = v; + ctf_str_atom_t *atom; + + if (existing->csa_str[0] == 0) + continue; + + if ((atom = malloc (sizeof (struct ctf_str_atom))) == NULL) + goto oom_str_add; + memcpy (atom, existing, sizeof (struct ctf_str_atom)); + memset (&atom->csa_refs, 0, sizeof(ctf_list_t)); + atom->csa_flags = 0; + + if (ctf_dynhash_insert (fp->ctf_str_atoms, atom->csa_str, atom) < 0) + { + free (atom); + goto oom_str_add; + } + } + } + else + { + /* Not serializing. Pull in all the strings in the strtab as new + atoms. The provisional strtab must be empty at this point, so + there is no need to populate atoms from it as well. Types in this + subset are frozen and readonly, so the refs list and movable refs + list need not be populated. */ + + for (i = 0; i < fp->ctf_str[CTF_STRTAB_0].cts_len; + i += strlen (&fp->ctf_str[CTF_STRTAB_0].cts_strs[i]) + 1) + { + ctf_str_atom_t *atom; + + if (fp->ctf_str[CTF_STRTAB_0].cts_strs[i] == 0) + continue; + + atom = ctf_str_add_ref_internal (fp, &fp->ctf_str[CTF_STRTAB_0].cts_strs[i], + 0, 0); + + if (!atom) + goto oom_str_add; + + atom->csa_offset = i; + } + } + return 0; oom_str_add: @@ -182,6 +257,11 @@ ctf_str_free_atoms (ctf_dict_t *fp) ctf_dynhash_destroy (fp->ctf_prov_strtab); ctf_dynhash_destroy (fp->ctf_str_atoms); ctf_dynhash_destroy (fp->ctf_str_movable_refs); + if (fp->ctf_dynstrtab) + { + free (fp->ctf_dynstrtab->cts_strs); + free (fp->ctf_dynstrtab); + } } #define CTF_STR_ADD_REF 0x1 @@ -538,69 +618,6 @@ ctf_str_update_refs (ctf_str_atom_t *refs, uint32_t value) *(ref->caf_ref) = value; } -/* State shared across the strtab write process. */ -typedef struct ctf_strtab_write_state -{ - /* Strtab we are writing, and the number of strings in it. */ - ctf_strs_writable_t *strtab; - size_t strtab_count; - - /* Pointers to (existing) atoms in the atoms table, for qsorting. */ - ctf_str_atom_t **sorttab; - - /* Loop counter for sorttab population. */ - size_t i; - - /* The null-string atom (skipped during population). */ - ctf_str_atom_t *nullstr; -} ctf_strtab_write_state_t; - -/* Count the number of entries in the strtab, and its length. */ -static void -ctf_str_count_strtab (void *key _libctf_unused_, void *value, - void *arg) -{ - ctf_str_atom_t *atom = (ctf_str_atom_t *) value; - ctf_strtab_write_state_t *s = (ctf_strtab_write_state_t *) arg; - - /* We only factor in the length of items that have no offset and have refs: - other items are in the external strtab, or will simply not be written out - at all. They still contribute to the total count, though, because we still - have to sort them. We add in the null string's length explicitly, outside - this function, since it is explicitly written out even if it has no refs at - all. */ - - if (s->nullstr == atom) - { - s->strtab_count++; - return; - } - - if (!ctf_list_empty_p (&atom->csa_refs)) - { - if (!atom->csa_external_offset) - s->strtab->cts_len += strlen (atom->csa_str) + 1; - s->strtab_count++; - } -} - -/* Populate the sorttab with pointers to the strtab atoms. */ -static void -ctf_str_populate_sorttab (void *key _libctf_unused_, void *value, - void *arg) -{ - ctf_str_atom_t *atom = (ctf_str_atom_t *) value; - ctf_strtab_write_state_t *s = (ctf_strtab_write_state_t *) arg; - - /* Skip the null string. */ - if (s->nullstr == atom) - return; - - /* Skip atoms with no refs. */ - if (!ctf_list_empty_p (&atom->csa_refs)) - s->sorttab[s->i++] = atom; -} - /* Sort the strtab. */ static int ctf_str_sort_strtab (const void *a, const void *b) @@ -612,79 +629,182 @@ ctf_str_sort_strtab (const void *a, const void *b) } /* Write out and return a strtab containing all strings with recorded refs, - adjusting the refs to refer to the corresponding string. The returned strtab - may be NULL on error. Also populate the synthetic strtab with mappings from - external strtab offsets to names, so we can look them up with ctf_strptr(). - Only external strtab offsets with references are added. */ -ctf_strs_writable_t + adjusting the refs to refer to the corresponding string. The returned + strtab is already assigned to strtab 0 in this dict, is owned by this + dict, and may be NULL on error. Also populate the synthetic strtab with + mappings from external strtab offsets to names, so we can look them up + with ctf_strptr(). Only external strtab offsets with references are + added. + + As a side effect, replaces the strtab of the current dict with the newly- + generated strtab. This is an exception to the general rule that + serialization does not change the dict passed in, because the alternative + is to copy the entire atoms table on every reserialization just to avoid + modifying the original, which is excessively costly for minimal gain. + + We use the lazy man's approach and double memory costs by always storing + atoms as individually allocated entities whenever they come from anywhere + but a freshly-opened, mmapped dict, even though after serialization there + is another copy in the strtab; this ensures that ctf_strptr()-returned + pointers to them remain valid for the lifetime of the dict. + + This is all rendered more complex because if a dict is ctf_open()ed it + will have a bunch of strings in its strtab already, and their strtab + offsets can never change (without piles of complexity to rescan the + entire dict just to get all the offsets to all of them into the atoms + table). Entries below the existing strtab limit are just copied into the + new dict: entries above it are new, and are are sorted first, then + appended to it. The sorting is purely a compression-efficiency + improvement, and we get nearly as good an improvement from sorting big + chunks like this as we would from sorting the whole thing. */ + +const ctf_strs_writable_t * ctf_str_write_strtab (ctf_dict_t *fp) { - ctf_strs_writable_t strtab; - ctf_str_atom_t *nullstr; + ctf_strs_writable_t *strtab; + size_t strtab_count = 0; uint32_t cur_stroff = 0; - ctf_strtab_write_state_t s; ctf_str_atom_t **sorttab; + ctf_next_t *it = NULL; size_t i; + void *v; + int err; + int new_strtab = 0; int any_external = 0; - memset (&strtab, 0, sizeof (struct ctf_strs_writable)); - memset (&s, 0, sizeof (struct ctf_strtab_write_state)); - s.strtab = &strtab; + strtab = calloc (1, sizeof (ctf_strs_writable_t)); + if (!strtab) + return NULL; + + /* The strtab contains the existing string table at its start: figure out + how many new strings we need to add. We only need to add new strings + that have no external offset, that have refs, and that are found in the + provisional strtab. If the existing strtab is empty we also need to + add the null string at its start. */ + + strtab->cts_len = fp->ctf_str[CTF_STRTAB_0].cts_len; - nullstr = ctf_dynhash_lookup (fp->ctf_str_atoms, ""); - if (!nullstr) + if (strtab->cts_len == 0) { - ctf_err_warn (fp, 0, ECTF_INTERNAL, _("null string not found in strtab")); - strtab.cts_strs = NULL; - return strtab; + new_strtab = 1; + strtab->cts_len++; /* For the \0. */ } - s.nullstr = nullstr; - ctf_dynhash_iter (fp->ctf_str_atoms, ctf_str_count_strtab, &s); - strtab.cts_len++; /* For the null string. */ + /* Count new entries in the strtab: i.e. entries in the provisional + strtab. Ignore any entry for \0, entries which ended up in the + external strtab, and unreferenced entries. */ - ctf_dprintf ("%lu bytes of strings in strtab.\n", - (unsigned long) strtab.cts_len); + while ((err = ctf_dynhash_next (fp->ctf_prov_strtab, &it, NULL, &v)) == 0) + { + const char *str = (const char *) v; + ctf_str_atom_t *atom; + + atom = ctf_dynhash_lookup (fp->ctf_str_atoms, str); + if (!ctf_assert (fp, atom)) + goto err_strtab; + + if (atom->csa_str[0] == 0 || ctf_list_empty_p (&atom->csa_refs) || + atom->csa_external_offset) + continue; + + strtab->cts_len += strlen (atom->csa_str) + 1; + strtab_count++; + } + if (err != ECTF_NEXT_END) + { + ctf_dprintf ("ctf_str_write_strtab: error counting strtab entries: %s\n", + ctf_errmsg (err)); + goto err_strtab; + } - /* Sort the strtab. Force the null string to be first. */ - sorttab = calloc (s.strtab_count, sizeof (ctf_str_atom_t *)); + ctf_dprintf ("%lu bytes of strings in strtab: %lu pre-existing.\n", + (unsigned long) strtab->cts_len, + (unsigned long) fp->ctf_str[CTF_STRTAB_0].cts_len); + + /* Sort the new part of the strtab. */ + + sorttab = calloc (strtab_count, sizeof (ctf_str_atom_t *)); if (!sorttab) - goto oom; + { + ctf_set_errno (fp, ENOMEM); + goto err_strtab; + } - sorttab[0] = nullstr; - s.i = 1; - s.sorttab = sorttab; - ctf_dynhash_iter (fp->ctf_str_atoms, ctf_str_populate_sorttab, &s); + i = 0; + while ((err = ctf_dynhash_next (fp->ctf_prov_strtab, &it, NULL, &v)) == 0) + { + ctf_str_atom_t *atom; - qsort (&sorttab[1], s.strtab_count - 1, sizeof (ctf_str_atom_t *), + atom = ctf_dynhash_lookup (fp->ctf_str_atoms, v); + if (!ctf_assert (fp, atom)) + goto err_sorttab; + + if (atom->csa_str[0] == 0 || ctf_list_empty_p (&atom->csa_refs) || + atom->csa_external_offset) + continue; + + sorttab[i++] = atom; + } + + qsort (sorttab, strtab_count, sizeof (ctf_str_atom_t *), ctf_str_sort_strtab); - if ((strtab.cts_strs = malloc (strtab.cts_len)) == NULL) - goto oom_sorttab; + if ((strtab->cts_strs = malloc (strtab->cts_len)) == NULL) + goto err_sorttab; + + cur_stroff = fp->ctf_str[CTF_STRTAB_0].cts_len; - /* Update all refs: also update the strtab appropriately. */ - for (i = 0; i < s.strtab_count; i++) + if (new_strtab) { - if (sorttab[i]->csa_external_offset) - { - /* External strtab entry. */ + strtab->cts_strs[0] = 0; + cur_stroff++; + } + else + memcpy (strtab->cts_strs, fp->ctf_str[CTF_STRTAB_0].cts_strs, + fp->ctf_str[CTF_STRTAB_0].cts_len); + + /* Work over the sorttab, add its strings to the strtab, and remember + where they are in the csa_offset for the appropriate atom. No ref + updating is done at this point, because refs might well relate to + already-existing strings, or external strings, which do not need adding + to the strtab and may not be in the sorttab. */ + + for (i = 0; i < strtab_count; i++) + { + sorttab[i]->csa_offset = cur_stroff; + strcpy (&strtab->cts_strs[cur_stroff], sorttab[i]->csa_str); + cur_stroff += strlen (sorttab[i]->csa_str) + 1; + } + free (sorttab); + sorttab = NULL; + /* Update all refs, then purge them as no longer necessary: also update + the strtab appropriately. */ + + while ((err = ctf_dynhash_next (fp->ctf_str_atoms, &it, NULL, &v)) == 0) + { + ctf_str_atom_t *atom = (ctf_str_atom_t *) v; + uint32_t offset; + + if (ctf_list_empty_p (&atom->csa_refs)) + continue; + + if (atom->csa_external_offset) + { any_external = 1; - ctf_str_update_refs (sorttab[i], sorttab[i]->csa_external_offset); - sorttab[i]->csa_offset = sorttab[i]->csa_external_offset; + offset = atom->csa_external_offset; } else - { - /* Internal strtab entry with refs: actually add to the string - table. */ - - ctf_str_update_refs (sorttab[i], cur_stroff); - sorttab[i]->csa_offset = cur_stroff; - strcpy (&strtab.cts_strs[cur_stroff], sorttab[i]->csa_str); - cur_stroff += strlen (sorttab[i]->csa_str) + 1; - } + offset = atom->csa_offset; + ctf_str_update_refs (atom, offset); } - free (sorttab); + if (err != ECTF_NEXT_END) + { + ctf_dprintf ("ctf_str_write_strtab: error iterating over atoms while updating refs: %s\n", + ctf_errmsg (err)); + goto err_strtab; + } + ctf_str_purge_refs (fp); if (!any_external) { @@ -692,16 +812,29 @@ ctf_str_write_strtab (ctf_dict_t *fp) fp->ctf_syn_ext_strtab = NULL; } + /* Replace the old strtab with the new one in this dict. */ + + if (fp->ctf_dynstrtab) + { + free (fp->ctf_dynstrtab->cts_strs); + free (fp->ctf_dynstrtab); + } + + fp->ctf_dynstrtab = strtab; + fp->ctf_str[CTF_STRTAB_0].cts_strs = strtab->cts_strs; + fp->ctf_str[CTF_STRTAB_0].cts_len = strtab->cts_len; + /* All the provisional strtab entries are now real strtab entries, and ctf_strptr() will find them there. The provisional offset now starts right beyond the new end of the strtab. */ ctf_dynhash_empty (fp->ctf_prov_strtab); - fp->ctf_str_prov_offset = strtab.cts_len + 1; + fp->ctf_str_prov_offset = strtab->cts_len + 1; return strtab; - oom_sorttab: + err_sorttab: free (sorttab); - oom: - return strtab; + err_strtab: + free (strtab); + return NULL; } |