/*
* Return a boolean value indicating if two types are compatible integers or
* floating-pointer values. This function returns true if the two types are
* the same, or if they have the same ASCII name and encoding properties.
* This function could be extended to test for compatibility for other kinds.
*/
int
ctf_type_compat(ctf_file_t *lfp, ctf_id_t ltype,
ctf_file_t *rfp, ctf_id_t rtype)
{
const ctf_type_t *ltp, *rtp;
ctf_encoding_t le, re;
ctf_arinfo_t la, ra;
uint_t lkind, rkind;
if (ctf_type_cmp(lfp, ltype, rfp, rtype) == 0)
return (1);
ltype = ctf_type_resolve(lfp, ltype);
lkind = ctf_type_kind(lfp, ltype);
rtype = ctf_type_resolve(rfp, rtype);
rkind = ctf_type_kind(rfp, rtype);
if (lkind != rkind ||
(ltp = ctf_lookup_by_id(&lfp, ltype)) == NULL ||
(rtp = ctf_lookup_by_id(&rfp, rtype)) == NULL ||
strcmp(ctf_strptr(lfp, ltp->ctt_name),
ctf_strptr(rfp, rtp->ctt_name)) != 0)
return (0);
switch (lkind) {
case CTF_K_INTEGER:
case CTF_K_FLOAT:
return (ctf_type_encoding(lfp, ltype, &le) == 0 &&
ctf_type_encoding(rfp, rtype, &re) == 0 &&
bcmp(&le, &re, sizeof (ctf_encoding_t)) == 0);
case CTF_K_POINTER:
return (ctf_type_compat(lfp, ctf_type_reference(lfp, ltype),
rfp, ctf_type_reference(rfp, rtype)));
case CTF_K_ARRAY:
return (ctf_array_info(lfp, ltype, &la) == 0 &&
ctf_array_info(rfp, rtype, &ra) == 0 &&
la.ctr_nelems == ra.ctr_nelems && ctf_type_compat(
lfp, la.ctr_contents, rfp, ra.ctr_contents) &&
ctf_type_compat(lfp, la.ctr_index, rfp, ra.ctr_index));
case CTF_K_STRUCT:
case CTF_K_UNION:
return (ctf_type_size(lfp, ltype) == ctf_type_size(rfp, rtype));
case CTF_K_ENUM:
case CTF_K_FORWARD:
return (1); /* no other checks required for these type kinds */
default:
return (0); /* should not get here since we did a resolve */
}
}
int
mdb_ctf_type_encoding(mdb_ctf_id_t id, ctf_encoding_t *ep)
{
mdb_ctf_impl_t *idp = (mdb_ctf_impl_t *)&id;
if (ctf_type_encoding(idp->mci_fp, idp->mci_id, ep) == CTF_ERR)
return (set_errno(ctf_to_errno(ctf_errno(idp->mci_fp))));
return (0);
}
static int
ctfdump_types_cb(ctf_id_t id, boolean_t root, void *arg)
{
int kind, i, count;
ctf_id_t ref;
char name[512], ienc[128];
const char *encn;
ctf_funcinfo_t ctc;
ctf_arinfo_t ar;
ctf_encoding_t cte;
ssize_t size;
if ((kind = ctf_type_kind(g_fp, id)) == CTF_ERR)
ctfdump_fatal("encountered malformed ctf, type %s does not "
"have a kind: %s\n", name, ctf_errmsg(ctf_errno(g_fp)));
if (ctf_type_name(g_fp, id, name, sizeof (name)) == NULL) {
if (ctf_errno(g_fp) != ECTF_NOPARENT)
ctfdump_fatal("type %lu missing name: %s\n", id,
ctf_errmsg(ctf_errno(g_fp)));
(void) snprintf(name, sizeof (name), "(unknown %s)",
ctf_kind_name(g_fp, kind));
}
g_stats.cs_ntypes[kind]++;
if (root == B_TRUE)
ctfdump_printf(CTFDUMP_TYPES, " <%lu> ", id);
else
ctfdump_printf(CTFDUMP_TYPES, " [%lu] ", id);
switch (kind) {
case CTF_K_UNKNOWN:
break;
case CTF_K_INTEGER:
if (ctf_type_encoding(g_fp, id, &cte) == CTF_ERR)
ctfdump_fatal("failed to get encoding information "
"for %s: %s\n", name, ctf_errmsg(ctf_errno(g_fp)));
ctfdump_intenc_name(&cte, ienc, sizeof (ienc));
ctfdump_printf(CTFDUMP_TYPES,
"%s encoding=%s offset=%u bits=%u",
name, ienc, cte.cte_offset, cte.cte_bits);
break;
case CTF_K_FLOAT:
if (ctf_type_encoding(g_fp, id, &cte) == CTF_ERR)
ctfdump_fatal("failed to get encoding information "
"for %s: %s\n", name, ctf_errmsg(ctf_errno(g_fp)));
if (cte.cte_format < 1 || cte.cte_format > 12)
encn = "unknown";
else
encn = ctfdump_fpenc[cte.cte_format];
ctfdump_printf(CTFDUMP_TYPES, "%s encoding=%s offset=%u "
"bits=%u", name, encn, cte.cte_offset, cte.cte_bits);
break;
case CTF_K_POINTER:
if ((ref = ctf_type_reference(g_fp, id)) == CTF_ERR)
ctfdump_fatal("failed to get reference type for %s: "
"%s\n", name, ctf_errmsg(ctf_errno(g_fp)));
ctfdump_printf(CTFDUMP_TYPES, "%s refers to %lu", name,
ref);
break;
case CTF_K_ARRAY:
if (ctf_array_info(g_fp, id, &ar) == CTF_ERR)
ctfdump_fatal("failed to get array information for "
"%s: %s\n", name, ctf_errmsg(ctf_errno(g_fp)));
ctfdump_printf(CTFDUMP_TYPES, "%s contents: %lu, index: %lu",
name, ar.ctr_contents, ar.ctr_index);
break;
case CTF_K_FUNCTION:
if (ctf_func_info_by_id(g_fp, id, &ctc) == CTF_ERR)
ctfdump_fatal("failed to get function info for %s: "
"%s\n", name, ctf_errmsg(ctf_errno(g_fp)));
if (ctc.ctc_argc > 0) {
ctfdump_fargs_grow(ctc.ctc_argc);
if (ctf_func_args_by_id(g_fp, id, g_nfargc, g_fargc) ==
CTF_ERR)
ctfdump_fatal("failed to get function "
"arguments for %s: %s\n", name,
ctf_errmsg(ctf_errno(g_fp)));
}
ctfdump_printf(CTFDUMP_TYPES,
"%s returns: %lu args: (", name, ctc.ctc_return);
for (i = 0; i < ctc.ctc_argc; i++) {
ctfdump_printf(CTFDUMP_TYPES, "%lu%s", g_fargc[i],
i + 1 == ctc.ctc_argc ? "" : ", ");
}
if (ctc.ctc_flags & CTF_FUNC_VARARG)
ctfdump_printf(CTFDUMP_TYPES, "%s...",
ctc.ctc_argc == 0 ? "" : ", ");
ctfdump_printf(CTFDUMP_TYPES, ")");
break;
case CTF_K_STRUCT:
case CTF_K_UNION:
size = ctf_type_size(g_fp, id);
if (size == CTF_ERR)
ctfdump_fatal("failed to get size of %s: %s\n", name,
ctf_errmsg(ctf_errno(g_fp)));
ctfdump_printf(CTFDUMP_TYPES, "%s (%d bytes)\n", name, size);
count = 0;
if (ctf_member_iter(g_fp, id, ctfdump_member_cb, &count) != 0)
ctfdump_fatal("failed to iterate members of %s: %s\n",
name, ctf_errmsg(ctf_errno(g_fp)));
if (kind == CTF_K_STRUCT) {
g_stats.cs_nsmembs += count;
g_stats.cs_nsmax = MAX(count, g_stats.cs_nsmax);
g_stats.cs_structsz += size;
g_stats.cs_sszmax = MAX(size, g_stats.cs_sszmax);
} else {
g_stats.cs_numembs += count;
g_stats.cs_numax = MAX(count, g_stats.cs_numax);
g_stats.cs_unionsz += size;
g_stats.cs_uszmax = MAX(count, g_stats.cs_uszmax);
}
break;
case CTF_K_ENUM:
ctfdump_printf(CTFDUMP_TYPES, "%s\n", name);
count = 0;
if (ctf_enum_iter(g_fp, id, ctfdump_enum_cb, &count) != 0)
ctfdump_fatal("failed to iterate enumerators of %s: "
"%s\n", name, ctf_errmsg(ctf_errno(g_fp)));
g_stats.cs_nemembs += count;
g_stats.cs_nemax = MAX(g_stats.cs_nemax, count);
break;
case CTF_K_FORWARD:
ctfdump_printf(CTFDUMP_TYPES, "forward %s\n", name);
break;
case CTF_K_TYPEDEF:
if ((ref = ctf_type_reference(g_fp, id)) == CTF_ERR)
ctfdump_fatal("failed to get reference type for %s: "
"%s\n", name, ctf_errmsg(ctf_errno(g_fp)));
ctfdump_printf(CTFDUMP_TYPES, "typedef %s refers to %lu", name,
ref);
break;
case CTF_K_VOLATILE:
if ((ref = ctf_type_reference(g_fp, id)) == CTF_ERR)
ctfdump_fatal("failed to get reference type for %s: "
"%s\n", name, ctf_errmsg(ctf_errno(g_fp)));
ctfdump_printf(CTFDUMP_TYPES, "%s refers to %lu", name,
ref);
break;
case CTF_K_CONST:
if ((ref = ctf_type_reference(g_fp, id)) == CTF_ERR)
ctfdump_fatal("failed to get reference type for %s: "
"%s\n", name, ctf_errmsg(ctf_errno(g_fp)));
ctfdump_printf(CTFDUMP_TYPES, "%s refers to %lu", name,
ref);
break;
case CTF_K_RESTRICT:
if ((ref = ctf_type_reference(g_fp, id)) == CTF_ERR)
ctfdump_fatal("failed to get reference type for %s: "
"%s\n", name, ctf_errmsg(ctf_errno(g_fp)));
ctfdump_printf(CTFDUMP_TYPES, "%s refers to %lu", name,
ref);
break;
default:
ctfdump_fatal("encountered unknown kind for type %s: %d\n",
name, kind);
}
ctfdump_printf(CTFDUMP_TYPES, "\n");
return (0);
}
/*
* Initialize the type ID translation table with the byte offset of each type,
* and initialize the hash tables of each named type.
*/
static int
init_types(ctf_file_t *fp, const ctf_header_t *cth)
{
/* LINTED - pointer alignment */
const ctf_type_t *tbuf = (ctf_type_t *)(fp->ctf_buf + cth->cth_typeoff);
/* LINTED - pointer alignment */
const ctf_type_t *tend = (ctf_type_t *)(fp->ctf_buf + cth->cth_stroff);
ulong_t pop[CTF_K_MAX + 1] = { 0 };
const ctf_type_t *tp;
ctf_hash_t *hp;
ushort_t dst;
ctf_id_t id;
uint_t *xp;
/*
* We initially determine whether the container is a child or a parent
* based on the value of cth_parname. To support containers that pre-
* date cth_parname, we also scan the types themselves for references
* to values in the range reserved for child types in our first pass.
*/
int child = cth->cth_parname != 0;
int nlstructs = 0, nlunions = 0;
int err;
/*
* We make two passes through the entire type section. In this first
* pass, we count the number of each type and the total number of types.
*/
for (tp = tbuf; tp < tend; fp->ctf_typemax++) {
ushort_t kind = LCTF_INFO_KIND(fp, tp->ctt_info);
ulong_t vlen = LCTF_INFO_VLEN(fp, tp->ctt_info);
ssize_t size, increment;
size_t vbytes;
uint_t n;
(void) ctf_get_ctt_size(fp, tp, &size, &increment);
switch (kind) {
case CTF_K_INTEGER:
case CTF_K_FLOAT:
vbytes = sizeof (uint_t);
break;
case CTF_K_ARRAY:
vbytes = sizeof (ctf_array_t);
break;
case CTF_K_FUNCTION:
vbytes = sizeof (ushort_t) * (vlen + (vlen & 1));
break;
case CTF_K_STRUCT:
case CTF_K_UNION:
if (fp->ctf_version == CTF_VERSION_1 ||
size < CTF_LSTRUCT_THRESH) {
ctf_member_t *mp = (ctf_member_t *)
((uintptr_t)tp + increment);
vbytes = sizeof (ctf_member_t) * vlen;
for (n = vlen; n != 0; n--, mp++)
child |= CTF_TYPE_ISCHILD(mp->ctm_type);
} else {
ctf_lmember_t *lmp = (ctf_lmember_t *)
((uintptr_t)tp + increment);
vbytes = sizeof (ctf_lmember_t) * vlen;
for (n = vlen; n != 0; n--, lmp++)
child |=
CTF_TYPE_ISCHILD(lmp->ctlm_type);
}
break;
case CTF_K_ENUM:
vbytes = sizeof (ctf_enum_t) * vlen;
break;
case CTF_K_FORWARD:
/*
* For forward declarations, ctt_type is the CTF_K_*
* kind for the tag, so bump that population count too.
* If ctt_type is unknown, treat the tag as a struct.
*/
if (tp->ctt_type == CTF_K_UNKNOWN ||
tp->ctt_type >= CTF_K_MAX)
pop[CTF_K_STRUCT]++;
else
pop[tp->ctt_type]++;
/*FALLTHRU*/
case CTF_K_UNKNOWN:
vbytes = 0;
break;
case CTF_K_POINTER:
case CTF_K_TYPEDEF:
case CTF_K_VOLATILE:
case CTF_K_CONST:
case CTF_K_RESTRICT:
child |= CTF_TYPE_ISCHILD(tp->ctt_type);
vbytes = 0;
break;
default:
ctf_dprintf("detected invalid CTF kind -- %u\n", kind);
return (ECTF_CORRUPT);
}
tp = (ctf_type_t *)((uintptr_t)tp + increment + vbytes);
pop[kind]++;
}
/*
* If we detected a reference to a child type ID, then we know this
* container is a child and may have a parent's types imported later.
*/
if (child) {
ctf_dprintf("CTF container %p is a child\n", (void *)fp);
fp->ctf_flags |= LCTF_CHILD;
} else
ctf_dprintf("CTF container %p is a parent\n", (void *)fp);
/*
* Now that we've counted up the number of each type, we can allocate
* the hash tables, type translation table, and pointer table.
*/
if ((err = ctf_hash_create(&fp->ctf_structs, pop[CTF_K_STRUCT])) != 0)
return (err);
if ((err = ctf_hash_create(&fp->ctf_unions, pop[CTF_K_UNION])) != 0)
return (err);
if ((err = ctf_hash_create(&fp->ctf_enums, pop[CTF_K_ENUM])) != 0)
return (err);
if ((err = ctf_hash_create(&fp->ctf_names,
pop[CTF_K_INTEGER] + pop[CTF_K_FLOAT] + pop[CTF_K_FUNCTION] +
pop[CTF_K_TYPEDEF] + pop[CTF_K_POINTER] + pop[CTF_K_VOLATILE] +
pop[CTF_K_CONST] + pop[CTF_K_RESTRICT])) != 0)
return (err);
fp->ctf_txlate = ctf_alloc(sizeof (uint_t) * (fp->ctf_typemax + 1));
fp->ctf_ptrtab = ctf_alloc(sizeof (ushort_t) * (fp->ctf_typemax + 1));
if (fp->ctf_txlate == NULL || fp->ctf_ptrtab == NULL)
return (EAGAIN); /* memory allocation failed */
xp = fp->ctf_txlate;
*xp++ = 0; /* type id 0 is used as a sentinel value */
bzero(fp->ctf_txlate, sizeof (uint_t) * (fp->ctf_typemax + 1));
bzero(fp->ctf_ptrtab, sizeof (ushort_t) * (fp->ctf_typemax + 1));
/*
* In the second pass through the types, we fill in each entry of the
* type and pointer tables and add names to the appropriate hashes.
*/
for (id = 1, tp = tbuf; tp < tend; xp++, id++) {
ushort_t kind = LCTF_INFO_KIND(fp, tp->ctt_info);
ulong_t vlen = LCTF_INFO_VLEN(fp, tp->ctt_info);
ssize_t size, increment;
const char *name;
size_t vbytes;
ctf_helem_t *hep;
ctf_encoding_t cte;
(void) ctf_get_ctt_size(fp, tp, &size, &increment);
name = ctf_strptr(fp, tp->ctt_name);
switch (kind) {
case CTF_K_INTEGER:
case CTF_K_FLOAT:
/*
* Only insert a new integer base type definition if
* this type name has not been defined yet. We re-use
* the names with different encodings for bit-fields.
*/
if ((hep = ctf_hash_lookup(&fp->ctf_names, fp,
name, strlen(name))) == NULL) {
err = ctf_hash_insert(&fp->ctf_names, fp,
CTF_INDEX_TO_TYPE(id, child), tp->ctt_name);
if (err != 0 && err != ECTF_STRTAB)
return (err);
} else if (ctf_type_encoding(fp, hep->h_type,
&cte) == 0 && cte.cte_bits == 0) {
/*
* Work-around SOS8 stabs bug: replace existing
* intrinsic w/ same name if it was zero bits.
*/
hep->h_type = CTF_INDEX_TO_TYPE(id, child);
}
vbytes = sizeof (uint_t);
break;
case CTF_K_ARRAY:
vbytes = sizeof (ctf_array_t);
break;
case CTF_K_FUNCTION:
err = ctf_hash_insert(&fp->ctf_names, fp,
CTF_INDEX_TO_TYPE(id, child), tp->ctt_name);
if (err != 0 && err != ECTF_STRTAB)
return (err);
vbytes = sizeof (ushort_t) * (vlen + (vlen & 1));
break;
case CTF_K_STRUCT:
err = ctf_hash_define(&fp->ctf_structs, fp,
CTF_INDEX_TO_TYPE(id, child), tp->ctt_name);
if (err != 0 && err != ECTF_STRTAB)
return (err);
if (fp->ctf_version == CTF_VERSION_1 ||
size < CTF_LSTRUCT_THRESH)
vbytes = sizeof (ctf_member_t) * vlen;
else {
vbytes = sizeof (ctf_lmember_t) * vlen;
nlstructs++;
}
break;
case CTF_K_UNION:
err = ctf_hash_define(&fp->ctf_unions, fp,
CTF_INDEX_TO_TYPE(id, child), tp->ctt_name);
if (err != 0 && err != ECTF_STRTAB)
return (err);
if (fp->ctf_version == CTF_VERSION_1 ||
size < CTF_LSTRUCT_THRESH)
vbytes = sizeof (ctf_member_t) * vlen;
else {
vbytes = sizeof (ctf_lmember_t) * vlen;
nlunions++;
}
break;
case CTF_K_ENUM:
err = ctf_hash_define(&fp->ctf_enums, fp,
CTF_INDEX_TO_TYPE(id, child), tp->ctt_name);
if (err != 0 && err != ECTF_STRTAB)
return (err);
vbytes = sizeof (ctf_enum_t) * vlen;
break;
case CTF_K_TYPEDEF:
err = ctf_hash_insert(&fp->ctf_names, fp,
CTF_INDEX_TO_TYPE(id, child), tp->ctt_name);
if (err != 0 && err != ECTF_STRTAB)
return (err);
vbytes = 0;
break;
case CTF_K_FORWARD:
/*
* Only insert forward tags into the given hash if the
* type or tag name is not already present.
*/
switch (tp->ctt_type) {
case CTF_K_STRUCT:
hp = &fp->ctf_structs;
break;
case CTF_K_UNION:
hp = &fp->ctf_unions;
break;
case CTF_K_ENUM:
hp = &fp->ctf_enums;
break;
default:
hp = &fp->ctf_structs;
}
if (ctf_hash_lookup(hp, fp,
name, strlen(name)) == NULL) {
err = ctf_hash_insert(hp, fp,
CTF_INDEX_TO_TYPE(id, child), tp->ctt_name);
if (err != 0 && err != ECTF_STRTAB)
return (err);
}
vbytes = 0;
break;
case CTF_K_POINTER:
/*
* If the type referenced by the pointer is in this CTF
* container, then store the index of the pointer type
* in fp->ctf_ptrtab[ index of referenced type ].
*/
if (CTF_TYPE_ISCHILD(tp->ctt_type) == child &&
CTF_TYPE_TO_INDEX(tp->ctt_type) <= fp->ctf_typemax)
fp->ctf_ptrtab[
CTF_TYPE_TO_INDEX(tp->ctt_type)] = id;
/*FALLTHRU*/
case CTF_K_VOLATILE:
case CTF_K_CONST:
case CTF_K_RESTRICT:
err = ctf_hash_insert(&fp->ctf_names, fp,
CTF_INDEX_TO_TYPE(id, child), tp->ctt_name);
if (err != 0 && err != ECTF_STRTAB)
return (err);
/*FALLTHRU*/
default:
vbytes = 0;
break;
}
*xp = (uint_t)((uintptr_t)tp - (uintptr_t)fp->ctf_buf);
tp = (ctf_type_t *)((uintptr_t)tp + increment + vbytes);
}
ctf_dprintf("%lu total types processed\n", fp->ctf_typemax);
ctf_dprintf("%u enum names hashed\n", ctf_hash_size(&fp->ctf_enums));
ctf_dprintf("%u struct names hashed (%d long)\n",
ctf_hash_size(&fp->ctf_structs), nlstructs);
ctf_dprintf("%u union names hashed (%d long)\n",
ctf_hash_size(&fp->ctf_unions), nlunions);
ctf_dprintf("%u base type names hashed\n",
ctf_hash_size(&fp->ctf_names));
/*
* Make an additional pass through the pointer table to find pointers
* that point to anonymous typedef nodes. If we find one, modify the
* pointer table so that the pointer is also known to point to the
* node that is referenced by the anonymous typedef node.
*/
for (id = 1; id <= fp->ctf_typemax; id++) {
if ((dst = fp->ctf_ptrtab[id]) != 0) {
tp = LCTF_INDEX_TO_TYPEPTR(fp, id);
if (LCTF_INFO_KIND(fp, tp->ctt_info) == CTF_K_TYPEDEF &&
strcmp(ctf_strptr(fp, tp->ctt_name), "") == 0 &&
CTF_TYPE_ISCHILD(tp->ctt_type) == child &&
CTF_TYPE_TO_INDEX(tp->ctt_type) <= fp->ctf_typemax)
fp->ctf_ptrtab[
CTF_TYPE_TO_INDEX(tp->ctt_type)] = dst;
}
}
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;
uint_t dst_kind = CTF_K_UNKNOWN;
const ctf_type_t *tp;
const char *name;
uint_t kind, flag, vlen;
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;
ctf_helem_t *hep;
if (dst_fp == src_fp)
return (src_type);
if (!(dst_fp->ctf_flags & LCTF_RDWR))
return (ctf_set_errno(dst_fp, ECTF_RDONLY));
if ((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, tp->ctt_name);
kind = LCTF_INFO_KIND(src_fp, tp->ctt_info);
flag = LCTF_INFO_ROOT(src_fp, tp->ctt_info);
vlen = LCTF_INFO_VLEN(src_fp, 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' &&
(hep = ctf_hash_lookup(hp, dst_fp, name, strlen(name))) != NULL) {
dst_type = (ctf_id_t)hep->h_type;
dst_kind = ctf_type_kind(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) {
if (dst_kind != CTF_K_FORWARD || (kind != CTF_K_ENUM &&
kind != CTF_K_STRUCT && kind != CTF_K_UNION))
return (ctf_set_errno(dst_fp, ECTF_CONFLICT));
else
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.
*
* In the case of integer and floating point types, we match using the
* type encoding as well - else we may incorrectly return a bitfield
* type, for instance.
*/
if (dst_type == CTF_ERR && name[0] != '\0') {
for (dtd = ctf_list_prev(&dst_fp->ctf_dtdefs); dtd != NULL &&
CTF_TYPE_TO_INDEX(dtd->dtd_type) > dst_fp->ctf_dtoldid;
dtd = ctf_list_prev(dtd)) {
if (CTF_INFO_KIND(dtd->dtd_data.ctt_info) != kind ||
dtd->dtd_name == NULL ||
strcmp(dtd->dtd_name, name) != 0)
continue;
if (kind == CTF_K_INTEGER || kind == CTF_K_FLOAT) {
if (ctf_type_encoding(src_fp, src_type,
&src_en) != 0)
continue;
if (bcmp(&src_en, &dtd->dtd_u.dtu_enc,
sizeof (ctf_encoding_t)) != 0)
continue;
}
return (dtd->dtd_type);
}
}
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:
case CTF_K_FLOAT:
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) {
if (ctf_type_encoding(dst_fp, dst_type, &dst_en) != 0)
return (CTF_ERR); /* errno is set for us */
if (bcmp(&src_en, &dst_en, sizeof (ctf_encoding_t)))
return (ctf_set_errno(dst_fp, ECTF_CONFLICT));
} else if (kind == CTF_K_INTEGER) {
dst_type = ctf_add_integer(dst_fp, flag, name, &src_en);
} else
dst_type = ctf_add_float(dst_fp, flag, name, &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 (bcmp(&src_ar, &dst_ar, sizeof (ctf_arinfo_t)))
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, 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))
return (ctf_set_errno(dst_fp, ECTF_CONFLICT));
if (ctf_member_iter(src_fp, src_type, membcmp, &dst))
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 = (ushort_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 */
/*
* Now that we know that we can't fail, we go through and bump
* all the reference counts on the member types.
*/
for (dmd = ctf_list_next(&dtd->dtd_u.dtu_members);
dmd != NULL; dmd = ctf_list_next(dmd))
ctf_ref_inc(dst_fp, dmd->dmd_type);
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))
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
* <sys/types.h> typedefs that vary based on things like if
* _ILP32x 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);
}
int
ctf_add_member(ctf_file_t *fp, ctf_id_t souid, const char *name, ctf_id_t type)
{
ctf_dtdef_t *dtd = ctf_dtd_lookup(fp, souid);
ctf_dmdef_t *dmd;
ssize_t msize, malign, ssize;
uint_t kind, vlen, root;
char *s = NULL;
if (!(fp->ctf_flags & LCTF_RDWR))
return (ctf_set_errno(fp, ECTF_RDONLY));
if (dtd == NULL)
return (ctf_set_errno(fp, ECTF_BADID));
kind = CTF_INFO_KIND(dtd->dtd_data.ctt_info);
root = CTF_INFO_ISROOT(dtd->dtd_data.ctt_info);
vlen = CTF_INFO_VLEN(dtd->dtd_data.ctt_info);
if (kind != CTF_K_STRUCT && kind != CTF_K_UNION)
return (ctf_set_errno(fp, ECTF_NOTSOU));
if (vlen == CTF_MAX_VLEN)
return (ctf_set_errno(fp, ECTF_DTFULL));
if (name != NULL) {
for (dmd = ctf_list_next(&dtd->dtd_u.dtu_members);
dmd != NULL; dmd = ctf_list_next(dmd)) {
if (dmd->dmd_name != NULL &&
strcmp(dmd->dmd_name, name) == 0)
return (ctf_set_errno(fp, ECTF_DUPMEMBER));
}
}
if ((msize = ctf_type_size(fp, type)) == CTF_ERR ||
(malign = ctf_type_align(fp, type)) == CTF_ERR)
return (CTF_ERR); /* errno is set for us */
if ((dmd = ctf_alloc(sizeof (ctf_dmdef_t))) == NULL)
return (ctf_set_errno(fp, EAGAIN));
if (name != NULL && (s = ctf_strdup(name)) == NULL) {
ctf_free(dmd, sizeof (ctf_dmdef_t));
return (ctf_set_errno(fp, EAGAIN));
}
dmd->dmd_name = s;
dmd->dmd_type = type;
dmd->dmd_value = -1;
if (kind == CTF_K_STRUCT && vlen != 0) {
ctf_dmdef_t *lmd = ctf_list_prev(&dtd->dtd_u.dtu_members);
ctf_id_t ltype = ctf_type_resolve(fp, lmd->dmd_type);
size_t off = lmd->dmd_offset;
ctf_encoding_t linfo;
ssize_t lsize;
if (ctf_type_encoding(fp, ltype, &linfo) != CTF_ERR)
off += linfo.cte_bits;
else if ((lsize = ctf_type_size(fp, ltype)) != CTF_ERR)
off += lsize * NBBY;
/*
* Round up the offset of the end of the last member to the
* next byte boundary, convert 'off' to bytes, and then round
* it up again to the next multiple of the alignment required
* by the new member. Finally, convert back to bits and store
* the result in dmd_offset. Technically we could do more
* efficient packing if the new member is a bit-field, but
* we're the "compiler" and ANSI says we can do as we choose.
*/
off = roundup(off, NBBY) / NBBY;
off = roundup(off, MAX(malign, 1));
dmd->dmd_offset = off * NBBY;
ssize = off + msize;
} else {
dmd->dmd_offset = 0;
ssize = ctf_get_ctt_size(fp, &dtd->dtd_data, NULL, NULL);
ssize = MAX(ssize, msize);
}
if (ssize > CTF_MAX_SIZE) {
dtd->dtd_data.ctt_size = CTF_LSIZE_SENT;
dtd->dtd_data.ctt_lsizehi = CTF_SIZE_TO_LSIZE_HI(ssize);
dtd->dtd_data.ctt_lsizelo = CTF_SIZE_TO_LSIZE_LO(ssize);
} else
dtd->dtd_data.ctt_size = (ushort_t)ssize;
dtd->dtd_data.ctt_info = CTF_TYPE_INFO(kind, root, vlen + 1);
ctf_list_append(&dtd->dtd_u.dtu_members, dmd);
if (s != NULL)
fp->ctf_dtstrlen += strlen(s) + 1;
ctf_ref_inc(fp, type);
fp->ctf_flags |= LCTF_DIRTY;
return (0);
}
