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; }