bool putf(upb_textprinter *p, const char *fmt, ...) {
va_list args;
va_list args_copy;
char *str;
int written;
int len;
bool ok;
va_start(args, fmt);
/* Run once to get the length of the string. */
_upb_va_copy(args_copy, args);
len = _upb_vsnprintf(NULL, 0, fmt, args_copy);
va_end(args_copy);
/* + 1 for NULL terminator (vsprintf() requires it even if we don't). */
str = malloc(len + 1);
if (!str) return false;
written = vsprintf(str, fmt, args);
va_end(args);
UPB_ASSERT_VAR(written, written == len);
ok = upb_bytessink_putbuf(p->output_, p->subc, str, len, NULL);
free(str);
return ok;
}
static bool field_onnumber(void *closure, const void *hd, int32_t val) {
UPB_UNUSED(hd);
upb_descreader *r = closure;
bool ok = upb_fielddef_setnumber(r->f, val, NULL);
UPB_ASSERT_VAR(ok, ok);
return true;
}
// Rewrites the dispatch tables into machine code offsets.
static void patchdispatch(jitcompiler *jc) {
upb_inttable_iter i;
upb_inttable_begin(&i, &jc->group->methods);
for (; !upb_inttable_done(&i); upb_inttable_next(&i)) {
upb_pbdecodermethod *method = upb_value_getptr(upb_inttable_iter_value(&i));
method->is_native_ = true;
upb_inttable *dispatch = &method->dispatch;
upb_inttable_iter i2;
upb_inttable_begin(&i2, dispatch);
for (; !upb_inttable_done(&i2); upb_inttable_next(&i2)) {
uintptr_t key = upb_inttable_iter_key(&i2);
if (key == 0) continue;
uint64_t val = upb_value_getuint64(upb_inttable_iter_value(&i2));
uint64_t newval;
if (key <= UPB_MAX_FIELDNUMBER) {
// Primary slot.
uint64_t oldofs = val >> 16;
uint64_t newofs = dispatchofs(jc, method, oldofs);
newval = (val & 0xffff) | (newofs << 16);
assert((int64_t)newval > 0);
} else {
// Secondary slot. Since we have 64 bits for the value, we use an
// absolute offset.
newval = (uint64_t)(jc->group->jit_code + nativeofs(jc, method, val));
}
bool ok = upb_inttable_replace(dispatch, key, upb_value_uint64(newval));
UPB_ASSERT_VAR(ok, ok);
}
static void checkref(const upb_refcounted *r, const void *owner, bool ref2) {
upb_lock();
upb_value v;
bool found = upb_inttable_lookupptr(r->refs, owner, &v);
UPB_ASSERT_VAR(found, found);
trackedref *ref = upb_value_getptr(v);
assert(ref->is_ref2 == ref2);
upb_unlock();
}
void upb_symtab_freeze(upb_symtab *s) {
upb_refcounted *r;
bool ok;
assert(!upb_symtab_isfrozen(s));
r = upb_symtab_upcast_mutable(s);
/* The symtab does not take ref2's (see refcounted.h) on the defs, because
* defs cannot refer back to the table and therefore cannot create cycles. So
* 0 will suffice for maxdepth here. */
ok = upb_refcounted_freeze(&r, 1, NULL, 0);
UPB_ASSERT_VAR(ok, ok);
}
NOINLINE int32_t upb_pbdecoder_checktag_slow(upb_pbdecoder *d,
uint64_t expected) {
uint64_t data = 0;
size_t bytes = upb_value_size(expected);
size_t read = peekbytes(d, &data, bytes);
if (read == bytes && data == expected) {
// Advance past matched bytes.
int32_t ok = getbytes(d, &data, read);
UPB_ASSERT_VAR(ok, ok < 0);
return DECODE_OK;
} else if (read < bytes && memcmp(&data, &expected, read) == 0) {
return suspend_save(d);
} else {
return DECODE_MISMATCH;
}
}
upb_msgdef *upb_msgdef_dup(const upb_msgdef *m, const void *owner) {
upb_msgdef *newm = upb_msgdef_new(owner);
if (!newm) return NULL;
bool ok = upb_def_setfullname(upb_upcast(newm),
upb_def_fullname(upb_upcast(m)), NULL);
UPB_ASSERT_VAR(ok, ok);
upb_msg_iter i;
for(upb_msg_begin(&i, m); !upb_msg_done(&i); upb_msg_next(&i)) {
upb_fielddef *f = upb_fielddef_dup(upb_msg_iter_field(&i), &f);
if (!f || !upb_msgdef_addfield(newm, f, &f, NULL)) {
upb_msgdef_unref(newm, owner);
return NULL;
}
}
return newm;
}
const upb_handlers *upb_handlers_newfrozen(const upb_msgdef *m,
const void *owner,
upb_handlers_callback *callback,
void *closure) {
dfs_state state;
state.callback = callback;
state.closure = closure;
if (!upb_inttable_init(&state.tab, UPB_CTYPE_PTR)) return NULL;
upb_handlers *ret = newformsg(m, owner, &state);
upb_inttable_uninit(&state.tab);
if (!ret) return NULL;
upb_refcounted *r = UPB_UPCAST(ret);
bool ok = upb_refcounted_freeze(&r, 1, NULL, UPB_MAX_HANDLER_DEPTH);
UPB_ASSERT_VAR(ok, ok);
return ret;
}
bool upb_fielddef_setdefaultstr(upb_fielddef *f, const void *str, size_t len) {
assert(upb_fielddef_isstring(f) || f->type_ == UPB_TYPE(ENUM));
if (f->type_ == UPB_TYPE(ENUM) && !upb_isident(str, len, false)) return false;
if (f->default_is_string) {
upb_byteregion *bytes = upb_value_getbyteregion(f->defaultval);
assert(bytes);
upb_byteregion_free(bytes);
} else {
assert(f->type_ == UPB_TYPE(ENUM));
}
upb_byteregion *r = upb_byteregion_newl(str, len);
upb_value_setbyteregion(&f->defaultval, r);
upb_bytesuccess_t ret = upb_byteregion_fetch(r);
UPB_ASSERT_VAR(ret, ret == (len == 0 ? UPB_BYTE_EOF : UPB_BYTE_OK));
assert(upb_byteregion_available(r, 0) == upb_byteregion_len(r));
f->default_is_string = true;
return true;
}
static void untrack(const upb_refcounted *r, const void *owner, bool ref2) {
assert(owner);
if (owner == UPB_UNTRACKED_REF) return;
upb_lock();
upb_value v;
bool found = upb_inttable_lookupptr(r->refs, owner, &v);
// This assert will fail if an owner attempts to release a ref it didn't have.
UPB_ASSERT_VAR(found, found);
trackedref *ref = upb_value_getptr(v);
assert(ref->is_ref2 == ref2);
if (--ref->count == 0) {
free(ref);
upb_inttable_removeptr(r->refs, owner, NULL);
if (ref2) {
// We know this cast is safe when it is a ref2, because it's coming from
// another refcounted object.
const upb_refcounted *from = owner;
bool removed = upb_inttable_removeptr(from->ref2s, r, NULL);
assert(removed);
}
}
upb_unlock();
}
static upb_selector_t getsel(const upb_fielddef *f, upb_handlertype_t type) {
upb_selector_t ret;
bool ok = upb_handlers_getselector(f, type, &ret);
UPB_ASSERT_VAR(ok, ok);
return ret;
}
static void goto_endmsg(upb_pbdecoder *d) {
upb_value v;
bool found = upb_inttable_lookup32(d->top->dispatch, DISPATCH_ENDMSG, &v);
UPB_ASSERT_VAR(found, found);
d->pc = d->top->base + upb_value_getuint64(v);
}
// TODO(haberman): handle pushback
static void putbuf(upb_pb_encoder *e, const char *buf, size_t len) {
size_t n = upb_bytessink_putbuf(e->output_, e->subc, buf, len, NULL);
UPB_ASSERT_VAR(n, n == len);
}
static uint64_t getattr(const tarjan *t, const upb_refcounted *r) {
upb_value v;
bool found = upb_inttable_lookupptr(&t->objattr, r, &v);
UPB_ASSERT_VAR(found, found);
return upb_value_getuint64(v);
}
/* TODO(haberman): we need a lot more testing of error conditions.
* The came_from_user stuff in particular is not tested. */
bool upb_symtab_add(upb_symtab *s, upb_def *const*defs, int n, void *ref_donor,
upb_status *status) {
int i;
upb_strtable_iter iter;
upb_def **add_defs = NULL;
upb_strtable addtab;
upb_inttable seen;
assert(!upb_symtab_isfrozen(s));
if (!upb_strtable_init(&addtab, UPB_CTYPE_PTR)) {
upb_status_seterrmsg(status, "out of memory");
return false;
}
/* Add new defs to our "add" set. */
for (i = 0; i < n; i++) {
upb_def *def = defs[i];
const char *fullname;
upb_fielddef *f;
if (upb_def_isfrozen(def)) {
upb_status_seterrmsg(status, "added defs must be mutable");
goto err;
}
assert(!upb_def_isfrozen(def));
fullname = upb_def_fullname(def);
if (!fullname) {
upb_status_seterrmsg(
status, "Anonymous defs cannot be added to a symtab");
goto err;
}
f = upb_dyncast_fielddef_mutable(def);
if (f) {
if (!upb_fielddef_containingtypename(f)) {
upb_status_seterrmsg(status,
"Standalone fielddefs must have a containing type "
"(extendee) name set");
goto err;
}
} else {
if (upb_strtable_lookup(&addtab, fullname, NULL)) {
upb_status_seterrf(status, "Conflicting defs named '%s'", fullname);
goto err;
}
/* We need this to back out properly, because if there is a failure we
* need to donate the ref back to the caller. */
def->came_from_user = true;
upb_def_donateref(def, ref_donor, s);
if (!upb_strtable_insert(&addtab, fullname, upb_value_ptr(def)))
goto oom_err;
}
}
/* Add standalone fielddefs (ie. extensions) to the appropriate messages.
* If the appropriate message only exists in the existing symtab, duplicate
* it so we have a mutable copy we can add the fields to. */
for (i = 0; i < n; i++) {
upb_def *def = defs[i];
upb_fielddef *f = upb_dyncast_fielddef_mutable(def);
const char *msgname;
upb_value v;
upb_msgdef *m;
if (!f) continue;
msgname = upb_fielddef_containingtypename(f);
/* We validated this earlier in this function. */
assert(msgname);
/* If the extendee name is absolutely qualified, move past the initial ".".
* TODO(haberman): it is not obvious what it would mean if this was not
* absolutely qualified. */
if (msgname[0] == '.') {
msgname++;
}
if (upb_strtable_lookup(&addtab, msgname, &v)) {
/* Extendee is in the set of defs the user asked us to add. */
m = upb_value_getptr(v);
} else {
/* Need to find and dup the extendee from the existing symtab. */
const upb_msgdef *frozen_m = upb_symtab_lookupmsg(s, msgname);
if (!frozen_m) {
upb_status_seterrf(status,
"Tried to extend message %s that does not exist "
"in this SymbolTable.",
msgname);
goto err;
}
m = upb_msgdef_dup(frozen_m, s);
if (!m) goto oom_err;
if (!upb_strtable_insert(&addtab, msgname, upb_value_ptr(m))) {
upb_msgdef_unref(m, s);
goto oom_err;
}
}
if (!upb_msgdef_addfield(m, f, ref_donor, status)) {
goto err;
}
}
/* Add dups of any existing def that can reach a def with the same name as
* anything in our "add" set. */
if (!upb_inttable_init(&seen, UPB_CTYPE_BOOL)) goto oom_err;
upb_strtable_begin(&iter, &s->symtab);
for (; !upb_strtable_done(&iter); upb_strtable_next(&iter)) {
upb_def *def = upb_value_getptr(upb_strtable_iter_value(&iter));
upb_resolve_dfs(def, &addtab, s, &seen, status);
if (!upb_ok(status)) goto err;
}
upb_inttable_uninit(&seen);
/* Now using the table, resolve symbolic references for subdefs. */
upb_strtable_begin(&iter, &addtab);
for (; !upb_strtable_done(&iter); upb_strtable_next(&iter)) {
const char *base;
upb_def *def = upb_value_getptr(upb_strtable_iter_value(&iter));
upb_msgdef *m = upb_dyncast_msgdef_mutable(def);
upb_msg_field_iter j;
if (!m) continue;
/* Type names are resolved relative to the message in which they appear. */
base = upb_msgdef_fullname(m);
for(upb_msg_field_begin(&j, m);
!upb_msg_field_done(&j);
upb_msg_field_next(&j)) {
upb_fielddef *f = upb_msg_iter_field(&j);
const char *name = upb_fielddef_subdefname(f);
if (name && !upb_fielddef_subdef(f)) {
/* Try the lookup in the current set of to-be-added defs first. If not
* there, try existing defs. */
upb_def *subdef = upb_resolvename(&addtab, base, name);
if (subdef == NULL) {
subdef = upb_resolvename(&s->symtab, base, name);
}
if (subdef == NULL) {
upb_status_seterrf(
status, "couldn't resolve name '%s' in message '%s'", name, base);
goto err;
} else if (!upb_fielddef_setsubdef(f, subdef, status)) {
goto err;
}
}
}
}
/* We need an array of the defs in addtab, for passing to upb_def_freeze. */
add_defs = malloc(sizeof(void*) * upb_strtable_count(&addtab));
if (add_defs == NULL) goto oom_err;
upb_strtable_begin(&iter, &addtab);
for (n = 0; !upb_strtable_done(&iter); upb_strtable_next(&iter)) {
add_defs[n++] = upb_value_getptr(upb_strtable_iter_value(&iter));
}
if (!upb_def_freeze(add_defs, n, status)) goto err;
/* This must be delayed until all errors have been detected, since error
* recovery code uses this table to cleanup defs. */
upb_strtable_uninit(&addtab);
/* TODO(haberman) we don't properly handle errors after this point (like
* OOM in upb_strtable_insert() below). */
for (i = 0; i < n; i++) {
upb_def *def = add_defs[i];
const char *name = upb_def_fullname(def);
upb_value v;
bool success;
if (upb_strtable_remove(&s->symtab, name, &v)) {
const upb_def *def = upb_value_getptr(v);
upb_def_unref(def, s);
}
success = upb_strtable_insert(&s->symtab, name, upb_value_ptr(def));
UPB_ASSERT_VAR(success, success == true);
}
free(add_defs);
return true;
oom_err:
upb_status_seterrmsg(status, "out of memory");
err: {
/* For defs the user passed in, we need to donate the refs back. For defs
* we dup'd, we need to just unref them. */
upb_strtable_begin(&iter, &addtab);
for (; !upb_strtable_done(&iter); upb_strtable_next(&iter)) {
upb_def *def = upb_value_getptr(upb_strtable_iter_value(&iter));
bool came_from_user = def->came_from_user;
def->came_from_user = false;
if (came_from_user) {
upb_def_donateref(def, s, ref_donor);
} else {
upb_def_unref(def, s);
}
}
}
upb_strtable_uninit(&addtab);
free(add_defs);
assert(!upb_ok(status));
return false;
}