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[binutils-gdb.git] / libctf / ctf-dump.c
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1 /* Textual dumping of CTF data.
2 Copyright (C) 2019-2024 Free Software Foundation, Inc.
4 This file is part of libctf.
6 libctf is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
11 This program is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14 See the GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; see the file COPYING. If not see
18 <http://www.gnu.org/licenses/>. */
20 #include <ctf-impl.h>
21 #include <string.h>
23 #define str_append(s, a) ctf_str_append_noerr (s, a)
25 /* One item to be dumped, in string form. */
27 typedef struct ctf_dump_item
29 ctf_list_t cdi_list;
30 char *cdi_item;
31 } ctf_dump_item_t;
33 /* Cross-call state for dumping. Basically just enough to track the section in
34 use and a list of return strings. */
36 struct ctf_dump_state
38 ctf_sect_names_t cds_sect;
39 ctf_dict_t *cds_fp;
40 ctf_dump_item_t *cds_current;
41 ctf_list_t cds_items;
44 /* Cross-call state for ctf_dump_member. */
46 typedef struct ctf_dump_membstate
48 char **cdm_str;
49 ctf_dict_t *cdm_fp;
50 const char *cdm_toplevel_indent;
51 } ctf_dump_membstate_t;
53 static int
54 ctf_dump_append (ctf_dump_state_t *state, char *str)
56 ctf_dump_item_t *cdi;
58 if ((cdi = malloc (sizeof (struct ctf_dump_item))) == NULL)
59 return (ctf_set_errno (state->cds_fp, ENOMEM));
61 cdi->cdi_item = str;
62 ctf_list_append (&state->cds_items, cdi);
63 return 0;
66 static void
67 ctf_dump_free (ctf_dump_state_t *state)
69 ctf_dump_item_t *cdi, *next_cdi;
71 if (state == NULL)
72 return;
74 for (cdi = ctf_list_next (&state->cds_items); cdi != NULL;
75 cdi = next_cdi)
77 free (cdi->cdi_item);
78 next_cdi = ctf_list_next (cdi);
79 free (cdi);
83 /* Return a dump for a single type, without member info: but do optionally show
84 the type's references. */
86 #define CTF_FT_REFS 0x2 /* Print referenced types. */
87 #define CTF_FT_BITFIELD 0x4 /* Print :BITS if a bitfield. */
88 #define CTF_FT_ID 0x8 /* Print "ID: " in front of type IDs. */
90 static char *
91 ctf_dump_format_type (ctf_dict_t *fp, ctf_id_t id, int flag)
93 ctf_id_t new_id;
94 char *str = NULL, *bit = NULL, *buf = NULL;
96 ctf_set_errno (fp, 0);
97 new_id = id;
100 ctf_encoding_t ep;
101 ctf_arinfo_t ar;
102 int kind, unsliced_kind;
103 ssize_t size, align;
104 const char *nonroot_leader = "";
105 const char *nonroot_trailer = "";
106 const char *idstr = "";
108 id = new_id;
109 if (flag == CTF_ADD_NONROOT)
111 nonroot_leader = "{";
112 nonroot_trailer = "}";
115 buf = ctf_type_aname (fp, id);
116 if (!buf)
118 if (id == 0 || ctf_errno (fp) == ECTF_NONREPRESENTABLE)
120 ctf_set_errno (fp, ECTF_NONREPRESENTABLE);
121 str = str_append (str, " (type not represented in CTF)");
122 return str;
125 goto err;
128 if (flag & CTF_FT_ID)
129 idstr = "ID ";
130 if (asprintf (&bit, "%s%s0x%lx: (kind %i) ", nonroot_leader, idstr,
131 id, ctf_type_kind (fp, id)) < 0)
132 goto oom;
133 str = str_append (str, bit);
134 free (bit);
135 bit = NULL;
137 if (buf[0] != '\0')
138 str = str_append (str, buf);
140 free (buf);
141 buf = NULL;
143 unsliced_kind = ctf_type_kind_unsliced (fp, id);
144 kind = ctf_type_kind (fp, id);
146 /* Report encodings of everything with an encoding other than enums:
147 base-type enums cannot have a nonzero cte_offset or cte_bits value.
148 (Slices of them can, but they are of kind CTF_K_SLICE.) */
149 if (unsliced_kind != CTF_K_ENUM && ctf_type_encoding (fp, id, &ep) == 0)
151 if ((ssize_t) ep.cte_bits != ctf_type_size (fp, id) * CHAR_BIT
152 && flag & CTF_FT_BITFIELD)
154 if (asprintf (&bit, ":%i", ep.cte_bits) < 0)
155 goto oom;
156 str = str_append (str, bit);
157 free (bit);
158 bit = NULL;
161 if ((ssize_t) ep.cte_bits != ctf_type_size (fp, id) * CHAR_BIT
162 || ep.cte_offset != 0)
164 const char *slice = "";
166 if (unsliced_kind == CTF_K_SLICE)
167 slice = "slice ";
169 if (asprintf (&bit, " [%s0x%x:0x%x]",
170 slice, ep.cte_offset, ep.cte_bits) < 0)
171 goto oom;
172 str = str_append (str, bit);
173 free (bit);
174 bit = NULL;
177 if (asprintf (&bit, " (format 0x%x)", ep.cte_format) < 0)
178 goto oom;
179 str = str_append (str, bit);
180 free (bit);
181 bit = NULL;
184 size = ctf_type_size (fp, id);
185 if (kind != CTF_K_FUNCTION && size >= 0)
187 if (asprintf (&bit, " (size 0x%lx)", (unsigned long int) size) < 0)
188 goto oom;
190 str = str_append (str, bit);
191 free (bit);
192 bit = NULL;
195 align = ctf_type_align (fp, id);
196 if (align >= 0)
198 if (asprintf (&bit, " (aligned at 0x%lx)",
199 (unsigned long int) align) < 0)
200 goto oom;
202 str = str_append (str, bit);
203 free (bit);
204 bit = NULL;
207 if (nonroot_trailer[0] != 0)
208 str = str_append (str, nonroot_trailer);
210 /* Just exit after one iteration if we are not showing the types this type
211 references. */
212 if (!(flag & CTF_FT_REFS))
213 return str;
215 /* Keep going as long as this type references another. We consider arrays
216 to "reference" their element type. */
218 if (kind == CTF_K_ARRAY)
220 if (ctf_array_info (fp, id, &ar) < 0)
221 goto err;
222 new_id = ar.ctr_contents;
224 else
225 new_id = ctf_type_reference (fp, id);
226 if (new_id != CTF_ERR)
227 str = str_append (str, " -> ");
229 while (new_id != CTF_ERR);
231 if (ctf_errno (fp) != ECTF_NOTREF)
233 free (str);
234 return NULL;
237 return str;
239 oom:
240 ctf_set_errno (fp, errno);
241 err:
242 ctf_err_warn (fp, 1, 0, _("cannot format name dumping type 0x%lx"), id);
243 free (buf);
244 free (str);
245 free (bit);
246 return NULL;
249 /* Dump one string field from the file header into the cds_items. */
250 static int
251 ctf_dump_header_strfield (ctf_dict_t *fp, ctf_dump_state_t *state,
252 const char *name, uint32_t value)
254 char *str;
255 if (value)
257 if (asprintf (&str, "%s: %s\n", name, ctf_strptr (fp, value)) < 0)
258 goto err;
259 ctf_dump_append (state, str);
261 return 0;
263 err:
264 return (ctf_set_errno (fp, errno));
267 /* Dump one section-offset field from the file header into the cds_items. */
268 static int
269 ctf_dump_header_sectfield (ctf_dict_t *fp, ctf_dump_state_t *state,
270 const char *sect, uint32_t off, uint32_t nextoff)
272 char *str;
273 if (nextoff - off)
275 if (asprintf (&str, "%s:\t0x%lx -- 0x%lx (0x%lx bytes)\n", sect,
276 (unsigned long) off, (unsigned long) (nextoff - 1),
277 (unsigned long) (nextoff - off)) < 0)
278 goto err;
279 ctf_dump_append (state, str);
281 return 0;
283 err:
284 return (ctf_set_errno (fp, errno));
287 /* Dump the file header into the cds_items. */
288 static int
289 ctf_dump_header (ctf_dict_t *fp, ctf_dump_state_t *state)
291 char *str;
292 char *flagstr = NULL;
293 const ctf_header_t *hp = fp->ctf_header;
294 const char *vertab[] =
296 NULL, "CTF_VERSION_1",
297 "CTF_VERSION_1_UPGRADED_3 (latest format, version 1 type "
298 "boundaries)",
299 "CTF_VERSION_2",
300 "CTF_VERSION_3", NULL
302 const char *verstr = NULL;
304 if (asprintf (&str, "Magic number: 0x%x\n", hp->cth_magic) < 0)
305 goto err;
306 ctf_dump_append (state, str);
308 if (hp->cth_version <= CTF_VERSION)
309 verstr = vertab[hp->cth_version];
311 if (verstr == NULL)
312 verstr = "(not a valid version)";
314 if (asprintf (&str, "Version: %i (%s)\n", hp->cth_version,
315 verstr) < 0)
316 goto err;
317 ctf_dump_append (state, str);
319 /* Everything else is only printed if present. */
321 /* The flags are unusual in that they represent the ctf_dict_t *in memory*:
322 flags representing compression, etc, are turned off as the file is
323 decompressed. So we store a copy of the flags before they are changed, for
324 the dumper. */
326 if (fp->ctf_openflags > 0)
328 if (asprintf (&flagstr, "%s%s%s%s%s%s%s",
329 fp->ctf_openflags & CTF_F_COMPRESS
330 ? "CTF_F_COMPRESS": "",
331 (fp->ctf_openflags & CTF_F_COMPRESS)
332 && (fp->ctf_openflags & ~CTF_F_COMPRESS)
333 ? ", " : "",
334 fp->ctf_openflags & CTF_F_NEWFUNCINFO
335 ? "CTF_F_NEWFUNCINFO" : "",
336 (fp->ctf_openflags & (CTF_F_COMPRESS | CTF_F_NEWFUNCINFO))
337 && (fp->ctf_openflags & ~(CTF_F_COMPRESS | CTF_F_NEWFUNCINFO))
338 ? ", " : "",
339 fp->ctf_openflags & CTF_F_IDXSORTED
340 ? "CTF_F_IDXSORTED" : "",
341 fp->ctf_openflags & (CTF_F_COMPRESS | CTF_F_NEWFUNCINFO
342 | CTF_F_IDXSORTED)
343 && (fp->ctf_openflags & ~(CTF_F_COMPRESS | CTF_F_NEWFUNCINFO
344 | CTF_F_IDXSORTED))
345 ? ", " : "",
346 fp->ctf_openflags & CTF_F_DYNSTR
347 ? "CTF_F_DYNSTR" : "") < 0)
348 goto err;
350 if (asprintf (&str, "Flags: 0x%x (%s)", fp->ctf_openflags, flagstr) < 0)
351 goto err;
352 ctf_dump_append (state, str);
355 if (ctf_dump_header_strfield (fp, state, "Parent label",
356 hp->cth_parlabel) < 0)
357 goto err;
359 if (ctf_dump_header_strfield (fp, state, "Parent name", hp->cth_parname) < 0)
360 goto err;
362 if (ctf_dump_header_strfield (fp, state, "Compilation unit name",
363 hp->cth_cuname) < 0)
364 goto err;
366 if (ctf_dump_header_sectfield (fp, state, "Label section", hp->cth_lbloff,
367 hp->cth_objtoff) < 0)
368 goto err;
370 if (ctf_dump_header_sectfield (fp, state, "Data object section",
371 hp->cth_objtoff, hp->cth_funcoff) < 0)
372 goto err;
374 if (ctf_dump_header_sectfield (fp, state, "Function info section",
375 hp->cth_funcoff, hp->cth_objtidxoff) < 0)
376 goto err;
378 if (ctf_dump_header_sectfield (fp, state, "Object index section",
379 hp->cth_objtidxoff, hp->cth_funcidxoff) < 0)
380 goto err;
382 if (ctf_dump_header_sectfield (fp, state, "Function index section",
383 hp->cth_funcidxoff, hp->cth_varoff) < 0)
384 goto err;
386 if (ctf_dump_header_sectfield (fp, state, "Variable section",
387 hp->cth_varoff, hp->cth_typeoff) < 0)
388 goto err;
390 if (ctf_dump_header_sectfield (fp, state, "Type section",
391 hp->cth_typeoff, hp->cth_stroff) < 0)
392 goto err;
394 if (ctf_dump_header_sectfield (fp, state, "String section", hp->cth_stroff,
395 hp->cth_stroff + hp->cth_strlen + 1) < 0)
396 goto err;
398 return 0;
399 err:
400 free (flagstr);
401 return (ctf_set_errno (fp, errno));
404 /* Dump a single label into the cds_items. */
406 static int
407 ctf_dump_label (const char *name, const ctf_lblinfo_t *info,
408 void *arg)
410 char *str;
411 char *typestr;
412 ctf_dump_state_t *state = arg;
414 if (asprintf (&str, "%s -> ", name) < 0)
415 return (ctf_set_errno (state->cds_fp, errno));
417 if ((typestr = ctf_dump_format_type (state->cds_fp, info->ctb_type,
418 CTF_ADD_ROOT | CTF_FT_REFS)) == NULL)
420 free (str);
421 return 0; /* Swallow the error. */
424 str = str_append (str, typestr);
425 free (typestr);
427 ctf_dump_append (state, str);
428 return 0;
431 /* Dump all the object or function entries into the cds_items. */
433 static int
434 ctf_dump_objts (ctf_dict_t *fp, ctf_dump_state_t *state, int functions)
436 const char *name;
437 ctf_id_t id;
438 ctf_next_t *i = NULL;
439 char *str = NULL;
441 if ((functions && fp->ctf_funcidx_names)
442 || (!functions && fp->ctf_objtidx_names))
443 str = str_append (str, _("Section is indexed.\n"));
444 else if (fp->ctf_symtab.cts_data == NULL)
445 str = str_append (str, _("No symbol table.\n"));
447 while ((id = ctf_symbol_next (fp, &i, &name, functions)) != CTF_ERR)
449 char *typestr = NULL;
451 /* Emit the name, if we know it. No trailing space: ctf_dump_format_type
452 has a leading one. */
453 if (name)
455 if (asprintf (&str, "%s -> ", name) < 0)
456 goto oom;
458 else
459 str = xstrdup ("");
461 if ((typestr = ctf_dump_format_type (state->cds_fp, id,
462 CTF_ADD_ROOT | CTF_FT_REFS)) == NULL)
464 ctf_dump_append (state, str);
465 continue; /* Swallow the error. */
468 str = str_append (str, typestr);
469 free (typestr);
470 ctf_dump_append (state, str);
471 continue;
473 oom:
474 ctf_set_errno (fp, ENOMEM);
475 ctf_next_destroy (i);
476 return -1;
478 return 0;
481 /* Dump a single variable into the cds_items. */
482 static int
483 ctf_dump_var (const char *name, ctf_id_t type, void *arg)
485 char *str;
486 char *typestr;
487 ctf_dump_state_t *state = arg;
489 if (asprintf (&str, "%s -> ", name) < 0)
490 return (ctf_set_errno (state->cds_fp, errno));
492 if ((typestr = ctf_dump_format_type (state->cds_fp, type,
493 CTF_ADD_ROOT | CTF_FT_REFS)) == NULL)
495 free (str);
496 return 0; /* Swallow the error. */
499 str = str_append (str, typestr);
500 free (typestr);
502 ctf_dump_append (state, str);
503 return 0;
506 /* Dump a single struct/union member into the string in the membstate. */
507 static int
508 ctf_dump_member (const char *name, ctf_id_t id, unsigned long offset,
509 int depth, void *arg)
511 ctf_dump_membstate_t *state = arg;
512 char *typestr = NULL;
513 char *bit = NULL;
515 /* The struct/union itself has already been printed. */
516 if (depth == 0)
517 return 0;
519 if (asprintf (&bit, "%s%*s", state->cdm_toplevel_indent, (depth-1)*4, "") < 0)
520 goto oom;
521 *state->cdm_str = str_append (*state->cdm_str, bit);
522 free (bit);
524 if ((typestr = ctf_dump_format_type (state->cdm_fp, id,
525 CTF_ADD_ROOT | CTF_FT_BITFIELD
526 | CTF_FT_ID)) == NULL)
527 return -1; /* errno is set for us. */
529 if (asprintf (&bit, "[0x%lx] %s: %s\n", offset, name, typestr) < 0)
530 goto oom;
532 *state->cdm_str = str_append (*state->cdm_str, bit);
533 free (typestr);
534 free (bit);
535 typestr = NULL;
536 bit = NULL;
538 return 0;
540 oom:
541 free (typestr);
542 free (bit);
543 return (ctf_set_errno (state->cdm_fp, errno));
546 /* Report the number of digits in the hexadecimal representation of a type
547 ID. */
549 static int
550 type_hex_digits (ctf_id_t id)
552 int i = 0;
554 if (id == 0)
555 return 1;
557 for (; id > 0; id >>= 4, i++);
558 return i;
561 /* Dump a single type into the cds_items. */
562 static int
563 ctf_dump_type (ctf_id_t id, int flag, void *arg)
565 char *str;
566 char *indent;
567 ctf_dump_state_t *state = arg;
568 ctf_dump_membstate_t membstate = { &str, state->cds_fp, NULL };
570 /* Indent neatly. */
571 if (asprintf (&indent, " %*s", type_hex_digits (id), "") < 0)
572 return (ctf_set_errno (state->cds_fp, ENOMEM));
574 /* Dump the type itself. */
575 if ((str = ctf_dump_format_type (state->cds_fp, id,
576 flag | CTF_FT_REFS)) == NULL)
577 goto err;
578 str = str_append (str, "\n");
580 membstate.cdm_toplevel_indent = indent;
582 /* Member dumping for structs, unions... */
583 if (ctf_type_kind (state->cds_fp, id) == CTF_K_STRUCT
584 || ctf_type_kind (state->cds_fp, id) == CTF_K_UNION)
586 if ((ctf_type_visit (state->cds_fp, id, ctf_dump_member, &membstate)) < 0)
588 if (id == 0 || ctf_errno (state->cds_fp) == ECTF_NONREPRESENTABLE)
590 ctf_dump_append (state, str);
591 return 0;
593 ctf_err_warn (state->cds_fp, 1, ctf_errno (state->cds_fp),
594 _("cannot visit members dumping type 0x%lx"), id);
595 goto err;
599 /* ... and enums, for which we dump the first and last few members and skip
600 the ones in the middle. */
601 if (ctf_type_kind (state->cds_fp, id) == CTF_K_ENUM)
603 int enum_count = ctf_member_count (state->cds_fp, id);
604 ctf_next_t *it = NULL;
605 int i = 0;
606 const char *enumerand;
607 char *bit;
608 int value;
610 while ((enumerand = ctf_enum_next (state->cds_fp, id,
611 &it, &value)) != NULL)
613 i++;
614 if ((i > 5) && (i < enum_count - 4))
615 continue;
617 str = str_append (str, indent);
619 if (asprintf (&bit, "%s: %i\n", enumerand, value) < 0)
621 ctf_next_destroy (it);
622 goto oom;
624 str = str_append (str, bit);
625 free (bit);
627 if ((i == 5) && (enum_count > 10))
629 str = str_append (str, indent);
630 str = str_append (str, "...\n");
633 if (ctf_errno (state->cds_fp) != ECTF_NEXT_END)
635 ctf_err_warn (state->cds_fp, 1, ctf_errno (state->cds_fp),
636 _("cannot visit enumerands dumping type 0x%lx"), id);
637 goto err;
641 ctf_dump_append (state, str);
642 free (indent);
644 return 0;
646 err:
647 free (indent);
648 free (str);
650 /* Swallow the error: don't cause an error in one type to abort all
651 type dumping. */
652 return 0;
654 oom:
655 free (indent);
656 free (str);
657 return ctf_set_errno (state->cds_fp, ENOMEM);
660 /* Dump the string table into the cds_items. */
662 static int
663 ctf_dump_str (ctf_dict_t *fp, ctf_dump_state_t *state)
665 const char *s = fp->ctf_str[CTF_STRTAB_0].cts_strs;
667 for (; s < fp->ctf_str[CTF_STRTAB_0].cts_strs +
668 fp->ctf_str[CTF_STRTAB_0].cts_len;)
670 char *str;
671 if (asprintf (&str, "0x%lx: %s",
672 (unsigned long) (s - fp->ctf_str[CTF_STRTAB_0].cts_strs),
673 s) < 0)
674 return (ctf_set_errno (fp, errno));
675 ctf_dump_append (state, str);
676 s += strlen (s) + 1;
679 return 0;
682 /* Dump a particular section of a CTF file, in textual form. Call with a
683 pointer to a NULL STATE: each call emits a dynamically allocated string
684 containing a description of one entity in the specified section, in order.
685 Only the first call (with a NULL state) may vary SECT. Once the CTF section
686 has been entirely dumped, the call returns NULL and frees and annuls the
687 STATE, ready for another section to be dumped. The returned textual content
688 may span multiple lines: between each call the FUNC is called with one
689 textual line at a time, and should return a suitably decorated line (it can
690 allocate a new one and return it if it likes). */
692 char *
693 ctf_dump (ctf_dict_t *fp, ctf_dump_state_t **statep, ctf_sect_names_t sect,
694 ctf_dump_decorate_f *func, void *arg)
696 char *str;
697 char *line;
698 ctf_dump_state_t *state = NULL;
700 if (*statep == NULL)
702 /* Data collection. Transforming a call-at-a-time iterator into a
703 return-at-a-time iterator in a language without call/cc is annoying. It
704 is easiest to simply collect everything at once and then return it bit
705 by bit. The first call will take (much) longer than otherwise, but the
706 amortized time needed is the same. */
708 if ((*statep = malloc (sizeof (struct ctf_dump_state))) == NULL)
710 ctf_set_errno (fp, ENOMEM);
711 goto end;
713 state = *statep;
715 memset (state, 0, sizeof (struct ctf_dump_state));
716 state->cds_fp = fp;
717 state->cds_sect = sect;
719 switch (sect)
721 case CTF_SECT_HEADER:
722 ctf_dump_header (fp, state);
723 break;
724 case CTF_SECT_LABEL:
725 if (ctf_label_iter (fp, ctf_dump_label, state) < 0)
727 if (ctf_errno (fp) != ECTF_NOLABELDATA)
728 goto end; /* errno is set for us. */
729 ctf_set_errno (fp, 0);
731 break;
732 case CTF_SECT_OBJT:
733 if (ctf_dump_objts (fp, state, 0) < 0)
734 goto end; /* errno is set for us. */
735 break;
736 case CTF_SECT_FUNC:
737 if (ctf_dump_objts (fp, state, 1) < 0)
738 goto end; /* errno is set for us. */
739 break;
740 case CTF_SECT_VAR:
741 if (ctf_variable_iter (fp, ctf_dump_var, state) < 0)
742 goto end; /* errno is set for us. */
743 break;
744 case CTF_SECT_TYPE:
745 if (ctf_type_iter_all (fp, ctf_dump_type, state) < 0)
746 goto end; /* errno is set for us. */
747 break;
748 case CTF_SECT_STR:
749 ctf_dump_str (fp, state);
750 break;
751 default:
752 ctf_set_errno (fp, ECTF_DUMPSECTUNKNOWN);
753 goto end;
756 else
758 state = *statep;
760 if (state->cds_sect != sect)
762 ctf_set_errno (fp, ECTF_DUMPSECTCHANGED);
763 goto end;
767 if (state->cds_current == NULL)
768 state->cds_current = ctf_list_next (&state->cds_items);
769 else
770 state->cds_current = ctf_list_next (state->cds_current);
772 if (state->cds_current == NULL)
773 goto end;
775 /* Hookery. There is some extra complexity to preserve linefeeds within each
776 item while removing linefeeds at the end. */
777 if (func)
779 size_t len;
781 str = NULL;
782 for (line = state->cds_current->cdi_item; line && *line; )
784 char *nline = line;
785 char *ret;
787 nline = strchr (line, '\n');
788 if (nline)
789 nline[0] = '\0';
791 ret = func (sect, line, arg);
792 str = str_append (str, ret);
793 str = str_append (str, "\n");
794 if (ret != line)
795 free (ret);
797 if (nline)
799 nline[0] = '\n';
800 nline++;
803 line = nline;
806 len = strlen (str);
808 if (str[len-1] == '\n')
809 str[len-1] = '\0';
811 else
813 str = strdup (state->cds_current->cdi_item);
814 if (!str)
816 ctf_set_errno (fp, ENOMEM);
817 return str;
821 ctf_set_errno (fp, 0);
822 return str;
824 end:
825 ctf_dump_free (state);
826 free (state);
827 ctf_set_errno (fp, 0);
828 *statep = NULL;
829 return NULL;