return 0;
}
+static int
+enumcmp (const char *name, int value, void *arg)
+{
+ ctf_bundle_t *ctb = arg;
+ int bvalue;
+
+ if (ctf_enum_value (ctb->ctb_file, ctb->ctb_type, name, &bvalue) == CTF_ERR)
+ {
+ ctf_dprintf ("Conflict due to member %s iteration error.\n", name);
+ return 1;
+ }
+ if (value != bvalue)
+ {
+ ctf_dprintf ("Conflict due to value change: %i versus %i\n",
+ value, bvalue);
+ return 1;
+ }
+ return 0;
+}
+
+static int
+enumadd (const char *name, int value, void *arg)
+{
+ ctf_bundle_t *ctb = arg;
+
+ return (ctf_add_enumerator (ctb->ctb_file, ctb->ctb_type,
+ name, value) == CTF_ERR);
+}
+
+static int
+membcmp (const char *name, ctf_id_t type _libctf_unused_, unsigned long offset,
+ void *arg)
+{
+ ctf_bundle_t *ctb = arg;
+ ctf_membinfo_t ctm;
+
+ if (ctf_member_info (ctb->ctb_file, ctb->ctb_type, name, &ctm) == CTF_ERR)
+ {
+ ctf_dprintf ("Conflict due to member %s iteration error.\n", name);
+ return 1;
+ }
+ if (ctm.ctm_offset != offset)
+ {
+ ctf_dprintf ("Conflict due to member %s offset change: "
+ "%lx versus %lx\n", name, ctm.ctm_offset, offset);
+ return 1;
+ }
+ return 0;
+}
+
+static int
+membadd (const char *name, ctf_id_t type, unsigned long offset, void *arg)
+{
+ ctf_bundle_t *ctb = arg;
+ ctf_dmdef_t *dmd;
+ char *s = NULL;
+
+ if ((dmd = ctf_alloc (sizeof (ctf_dmdef_t))) == NULL)
+ return (ctf_set_errno (ctb->ctb_file, EAGAIN));
+
+ if (name != NULL && (s = ctf_strdup (name)) == NULL)
+ {
+ ctf_free (dmd);
+ return (ctf_set_errno (ctb->ctb_file, EAGAIN));
+ }
+
+ /* For now, dmd_type is copied as the src_fp's type; it is reset to an
+ equivalent dst_fp type by a final loop in ctf_add_type(), below. */
+ dmd->dmd_name = s;
+ dmd->dmd_type = type;
+ dmd->dmd_offset = offset;
+ dmd->dmd_value = -1;
+
+ ctf_list_append (&ctb->ctb_dtd->dtd_u.dtu_members, dmd);
+
+ if (s != NULL)
+ ctb->ctb_file->ctf_dtvstrlen += strlen (s) + 1;
+
+ ctb->ctb_file->ctf_flags |= LCTF_DIRTY;
+ return 0;
+}
+
+/* The ctf_add_type routine is used to copy a type from a source CTF container
+ to a dynamic destination container. This routine operates recursively by
+ following the source type's links and embedded member types. If the
+ destination container already contains a named type which has the same
+ attributes, then we succeed and return this type but no changes occur. */
+ctf_id_t
+ctf_add_type (ctf_file_t *dst_fp, ctf_file_t *src_fp, ctf_id_t src_type)
+{
+ ctf_id_t dst_type = CTF_ERR;
+ uint32_t dst_kind = CTF_K_UNKNOWN;
+ ctf_id_t tmp;
+
+ const char *name;
+ uint32_t kind, flag, vlen;
+
+ const ctf_type_t *src_tp, *dst_tp;
+ ctf_bundle_t src, dst;
+ ctf_encoding_t src_en, dst_en;
+ ctf_arinfo_t src_ar, dst_ar;
+
+ ctf_dtdef_t *dtd;
+ ctf_funcinfo_t ctc;
+ ssize_t size;
+
+ ctf_hash_t *hp;
+
+ if (!(dst_fp->ctf_flags & LCTF_RDWR))
+ return (ctf_set_errno (dst_fp, ECTF_RDONLY));
+
+ if ((src_tp = ctf_lookup_by_id (&src_fp, src_type)) == NULL)
+ return (ctf_set_errno (dst_fp, ctf_errno (src_fp)));
+
+ name = ctf_strptr (src_fp, src_tp->ctt_name);
+ kind = LCTF_INFO_KIND (src_fp, src_tp->ctt_info);
+ flag = LCTF_INFO_ISROOT (src_fp, src_tp->ctt_info);
+ vlen = LCTF_INFO_VLEN (src_fp, src_tp->ctt_info);
+
+ switch (kind)
+ {
+ case CTF_K_STRUCT:
+ hp = dst_fp->ctf_structs;
+ break;
+ case CTF_K_UNION:
+ hp = dst_fp->ctf_unions;
+ break;
+ case CTF_K_ENUM:
+ hp = dst_fp->ctf_enums;
+ break;
+ default:
+ hp = dst_fp->ctf_names;
+ break;
+ }
+
+ /* If the source type has a name and is a root type (visible at the
+ top-level scope), lookup the name in the destination container and
+ verify that it is of the same kind before we do anything else. */
+
+ if ((flag & CTF_ADD_ROOT) && name[0] != '\0'
+ && (tmp = ctf_hash_lookup_type (hp, dst_fp, name)) != 0)
+ {
+ dst_type = tmp;
+ dst_kind = ctf_type_kind_unsliced (dst_fp, dst_type);
+ }
+
+ /* If an identically named dst_type exists, fail with ECTF_CONFLICT
+ unless dst_type is a forward declaration and src_type is a struct,
+ union, or enum (i.e. the definition of the previous forward decl). */
+
+ if (dst_type != CTF_ERR && dst_kind != kind
+ && (dst_kind != CTF_K_FORWARD
+ || (kind != CTF_K_ENUM && kind != CTF_K_STRUCT
+ && kind != CTF_K_UNION)))
+ {
+ ctf_dprintf ("Conflict for type %s: kinds differ, new: %i; "
+ "old (ID %lx): %i\n", name, kind, dst_type, dst_kind);
+ return (ctf_set_errno (dst_fp, ECTF_CONFLICT));
+ }
+
+ /* We take special action for an integer, float, or slice since it is
+ described not only by its name but also its encoding. For integers,
+ bit-fields exploit this degeneracy. */
+
+ if (kind == CTF_K_INTEGER || kind == CTF_K_FLOAT || kind == CTF_K_SLICE)
+ {
+ if (ctf_type_encoding (src_fp, src_type, &src_en) != 0)
+ return (ctf_set_errno (dst_fp, ctf_errno (src_fp)));
+
+ if (dst_type != CTF_ERR)
+ {
+ ctf_file_t *fp = dst_fp;
+
+ if ((dst_tp = ctf_lookup_by_id (&fp, dst_type)) == NULL)
+ return CTF_ERR;
+
+ if (LCTF_INFO_ISROOT (fp, dst_tp->ctt_info) & CTF_ADD_ROOT)
+ {
+ /* The type that we found in the hash is also root-visible. If
+ the two types match then use the existing one; otherwise,
+ declare a conflict. Note: slices are not certain to match
+ even if there is no conflict: we must check the contained type
+ too. */
+
+ if (ctf_type_encoding (dst_fp, dst_type, &dst_en) != 0)
+ return CTF_ERR; /* errno set for us. */
+
+ if (memcmp (&src_en, &dst_en, sizeof (ctf_encoding_t)) == 0)
+ {
+ if (kind != CTF_K_SLICE)
+ return dst_type;
+ }
+ else
+ {
+ return (ctf_set_errno (dst_fp, ECTF_CONFLICT));
+ }
+ }
+ else
+ {
+ /* We found a non-root-visible type in the hash. We reset
+ dst_type to ensure that we continue to look for a possible
+ conflict in the pending list. */
+
+ dst_type = CTF_ERR;
+ }
+ }
+ }
+
+ /* If the non-empty name was not found in the appropriate hash, search
+ the list of pending dynamic definitions that are not yet committed.
+ If a matching name and kind are found, assume this is the type that
+ we are looking for. This is necessary to permit ctf_add_type() to
+ operate recursively on entities such as a struct that contains a
+ pointer member that refers to the same struct type. */
+
+ if (dst_type == CTF_ERR && name[0] != '\0')
+ {
+ for (dtd = ctf_list_prev (&dst_fp->ctf_dtdefs); dtd != NULL
+ && LCTF_TYPE_TO_INDEX (src_fp, dtd->dtd_type) > dst_fp->ctf_dtoldid;
+ dtd = ctf_list_prev (dtd))
+ {
+ if (LCTF_INFO_KIND (src_fp, dtd->dtd_data.ctt_info) == kind
+ && dtd->dtd_name != NULL && strcmp (dtd->dtd_name, name) == 0)
+ {
+ int sroot; /* Is the src root-visible? */
+ int droot; /* Is the dst root-visible? */
+ int match; /* Do the encodings match? */
+
+ if (kind != CTF_K_INTEGER && kind != CTF_K_FLOAT && kind != CTF_K_SLICE)
+ return dtd->dtd_type;
+
+ sroot = (flag & CTF_ADD_ROOT);
+ droot = (LCTF_INFO_ISROOT (dst_fp,
+ dtd->dtd_data.
+ ctt_info) & CTF_ADD_ROOT);
+
+ match = (memcmp (&src_en, &dtd->dtd_u.dtu_enc,
+ sizeof (ctf_encoding_t)) == 0);
+
+ /* If the types share the same encoding then return the id of the
+ first unless one type is root-visible and the other is not; in
+ that case the new type must get a new id if a match is never
+ found. Note: slices are not certain to match even if there is
+ no conflict: we must check the contained type too. */
+
+ if (match && sroot == droot)
+ {
+ if (kind != CTF_K_SLICE)
+ return dtd->dtd_type;
+ }
+ else if (!match && sroot && droot)
+ {
+ return (ctf_set_errno (dst_fp, ECTF_CONFLICT));
+ }
+ }
+ }
+ }
+
+ src.ctb_file = src_fp;
+ src.ctb_type = src_type;
+ src.ctb_dtd = NULL;
+
+ dst.ctb_file = dst_fp;
+ dst.ctb_type = dst_type;
+ dst.ctb_dtd = NULL;
+
+ /* Now perform kind-specific processing. If dst_type is CTF_ERR, then
+ we add a new type with the same properties as src_type to dst_fp.
+ If dst_type is not CTF_ERR, then we verify that dst_type has the
+ same attributes as src_type. We recurse for embedded references. */
+ switch (kind)
+ {
+ case CTF_K_INTEGER:
+ /* If we found a match we will have either returned it or declared a
+ conflict. */
+ dst_type = ctf_add_integer (dst_fp, flag, name, &src_en);
+ break;
+
+ case CTF_K_FLOAT:
+ /* If we found a match we will have either returned it or declared a
+ conflict. */
+ dst_type = ctf_add_float (dst_fp, flag, name, &src_en);
+ break;
+
+ case CTF_K_SLICE:
+ /* We have checked for conflicting encodings: now try to add the
+ contained type. */
+ src_type = ctf_type_reference (src_fp, src_type);
+ dst_type = ctf_add_type (dst_fp, src_fp, src_type);
+
+ if (src_type == CTF_ERR)
+ return CTF_ERR; /* errno is set for us. */
+
+ dst_type = ctf_add_slice (dst_fp, flag, src_type, &src_en);
+ break;
+
+ case CTF_K_POINTER:
+ case CTF_K_VOLATILE:
+ case CTF_K_CONST:
+ case CTF_K_RESTRICT:
+ src_type = ctf_type_reference (src_fp, src_type);
+ src_type = ctf_add_type (dst_fp, src_fp, src_type);
+
+ if (src_type == CTF_ERR)
+ return CTF_ERR; /* errno is set for us. */
+
+ dst_type = ctf_add_reftype (dst_fp, flag, src_type, kind);
+ break;
+
+ case CTF_K_ARRAY:
+ if (ctf_array_info (src_fp, src_type, &src_ar) == CTF_ERR)
+ return (ctf_set_errno (dst_fp, ctf_errno (src_fp)));
+
+ src_ar.ctr_contents =
+ ctf_add_type (dst_fp, src_fp, src_ar.ctr_contents);
+ src_ar.ctr_index = ctf_add_type (dst_fp, src_fp, src_ar.ctr_index);
+ src_ar.ctr_nelems = src_ar.ctr_nelems;
+
+ if (src_ar.ctr_contents == CTF_ERR || src_ar.ctr_index == CTF_ERR)
+ return CTF_ERR; /* errno is set for us. */
+
+ if (dst_type != CTF_ERR)
+ {
+ if (ctf_array_info (dst_fp, dst_type, &dst_ar) != 0)
+ return CTF_ERR; /* errno is set for us. */
+
+ if (memcmp (&src_ar, &dst_ar, sizeof (ctf_arinfo_t)))
+ {
+ ctf_dprintf ("Conflict for type %s against ID %lx: "
+ "array info differs, old %lx/%lx/%x; "
+ "new: %lx/%lx/%x\n", name, dst_type,
+ src_ar.ctr_contents, src_ar.ctr_index,
+ src_ar.ctr_nelems, dst_ar.ctr_contents,
+ dst_ar.ctr_index, dst_ar.ctr_nelems);
+ return (ctf_set_errno (dst_fp, ECTF_CONFLICT));
+ }
+ }
+ else
+ dst_type = ctf_add_array (dst_fp, flag, &src_ar);
+ break;
+
+ case CTF_K_FUNCTION:
+ ctc.ctc_return = ctf_add_type (dst_fp, src_fp, src_tp->ctt_type);
+ ctc.ctc_argc = 0;
+ ctc.ctc_flags = 0;
+
+ if (ctc.ctc_return == CTF_ERR)
+ return CTF_ERR; /* errno is set for us. */
+
+ dst_type = ctf_add_function (dst_fp, flag, &ctc, NULL);
+ break;
+
+ case CTF_K_STRUCT:
+ case CTF_K_UNION:
+ {
+ ctf_dmdef_t *dmd;
+ int errs = 0;
+
+ /* Technically to match a struct or union we need to check both
+ ways (src members vs. dst, dst members vs. src) but we make
+ this more optimal by only checking src vs. dst and comparing
+ the total size of the structure (which we must do anyway)
+ which covers the possibility of dst members not in src.
+ This optimization can be defeated for unions, but is so
+ pathological as to render it irrelevant for our purposes. */
+
+ if (dst_type != CTF_ERR && dst_kind != CTF_K_FORWARD)
+ {
+ if (ctf_type_size (src_fp, src_type) !=
+ ctf_type_size (dst_fp, dst_type))
+ {
+ ctf_dprintf ("Conflict for type %s against ID %lx: "
+ "union size differs, old %li, new %li\n",
+ name, dst_type, ctf_type_size (src_fp, src_type),
+ ctf_type_size (dst_fp, dst_type));
+ return (ctf_set_errno (dst_fp, ECTF_CONFLICT));
+ }
+
+ if (ctf_member_iter (src_fp, src_type, membcmp, &dst))
+ {
+ ctf_dprintf ("Conflict for type %s against ID %lx: "
+ "members differ, see above\n", name, dst_type);
+ return (ctf_set_errno (dst_fp, ECTF_CONFLICT));
+ }
+
+ break;
+ }
+
+ /* Unlike the other cases, copying structs and unions is done
+ manually so as to avoid repeated lookups in ctf_add_member
+ and to ensure the exact same member offsets as in src_type. */
+
+ dst_type = ctf_add_generic (dst_fp, flag, name, &dtd);
+ if (dst_type == CTF_ERR)
+ return CTF_ERR; /* errno is set for us. */
+
+ dst.ctb_type = dst_type;
+ dst.ctb_dtd = dtd;
+
+ if (ctf_member_iter (src_fp, src_type, membadd, &dst) != 0)
+ errs++; /* Increment errs and fail at bottom of case. */
+
+ if ((size = ctf_type_size (src_fp, src_type)) > CTF_MAX_SIZE)
+ {
+ dtd->dtd_data.ctt_size = CTF_LSIZE_SENT;
+ dtd->dtd_data.ctt_lsizehi = CTF_SIZE_TO_LSIZE_HI (size);
+ dtd->dtd_data.ctt_lsizelo = CTF_SIZE_TO_LSIZE_LO (size);
+ }
+ else
+ dtd->dtd_data.ctt_size = (uint32_t) size;
+
+ dtd->dtd_data.ctt_info = CTF_TYPE_INFO (kind, flag, vlen);
+
+ /* Make a final pass through the members changing each dmd_type (a
+ src_fp type) to an equivalent type in dst_fp. We pass through all
+ members, leaving any that fail set to CTF_ERR. */
+ for (dmd = ctf_list_next (&dtd->dtd_u.dtu_members);
+ dmd != NULL; dmd = ctf_list_next (dmd))
+ {
+ if ((dmd->dmd_type = ctf_add_type (dst_fp, src_fp,
+ dmd->dmd_type)) == CTF_ERR)
+ errs++;
+ }
+
+ if (errs)
+ return CTF_ERR; /* errno is set for us. */
+ break;
+ }
+
+ case CTF_K_ENUM:
+ if (dst_type != CTF_ERR && dst_kind != CTF_K_FORWARD)
+ {
+ if (ctf_enum_iter (src_fp, src_type, enumcmp, &dst)
+ || ctf_enum_iter (dst_fp, dst_type, enumcmp, &src))
+ {
+ ctf_dprintf ("Conflict for enum %s against ID %lx: "
+ "members differ, see above\n", name, dst_type);
+ return (ctf_set_errno (dst_fp, ECTF_CONFLICT));
+ }
+ }
+ else
+ {
+ dst_type = ctf_add_enum (dst_fp, flag, name);
+ if ((dst.ctb_type = dst_type) == CTF_ERR
+ || ctf_enum_iter (src_fp, src_type, enumadd, &dst))
+ return CTF_ERR; /* errno is set for us */
+ }
+ break;
+
+ case CTF_K_FORWARD:
+ if (dst_type == CTF_ERR)
+ {
+ dst_type = ctf_add_forward (dst_fp, flag,
+ name, CTF_K_STRUCT); /* Assume STRUCT. */
+ }
+ break;
+
+ case CTF_K_TYPEDEF:
+ src_type = ctf_type_reference (src_fp, src_type);
+ src_type = ctf_add_type (dst_fp, src_fp, src_type);
+
+ if (src_type == CTF_ERR)
+ return CTF_ERR; /* errno is set for us. */
+
+ /* If dst_type is not CTF_ERR at this point, we should check if
+ ctf_type_reference(dst_fp, dst_type) != src_type and if so fail with
+ ECTF_CONFLICT. However, this causes problems with bitness typedefs
+ that vary based on things like if 32-bit then pid_t is int otherwise
+ long. We therefore omit this check and assume that if the identically
+ named typedef already exists in dst_fp, it is correct or
+ equivalent. */
+
+ if (dst_type == CTF_ERR)
+ {
+ dst_type = ctf_add_typedef (dst_fp, flag, name, src_type);
+ }
+ break;
+
+ default:
+ return (ctf_set_errno (dst_fp, ECTF_CORRUPT));
+ }
+
+ return dst_type;
+}
+
/* Write the compressed CTF data stream to the specified gzFile descriptor.
This is useful for saving the results of dynamic CTF containers. */
int
projects / deliverable / binutils-gdb.git / commitdiff
