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llama : validate special token ids are in range when loading GGUF model (#3635)

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* Add validation for special token ids to llama.cpp

Small optimization for llama_byte_to_token SPM mode

* Fix BPE newline check, only I could break something so simple

* Killll meeeeee

* Account for GGUF_KEY_KEY only setting when the key exists

* Minor code cleanups.

* Fix convert.py error msg when added tokens are out of range

* Make gguf SpecialVocab vocab size-aware

Update conversion scripts accordingly

* Avoid a string copy

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>

---------

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>
This commit is contained in:
Kerfuffle 2023-10-22 12:14:56 -06:00 committed by GitHub
parent d3956aea53
commit a5e7dbd614
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11 changed files with 72 additions and 32 deletions
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2
convert-baichuan-hf-to-gguf.py
View File

@ -230,7 +230,7 @@ gguf_writer.add_token_list(tokens)
gguf_writer.add_token_scores(scores)
gguf_writer.add_token_types(toktypes)
special_vocab = gguf.SpecialVocab(dir_model)
special_vocab = gguf.SpecialVocab(dir_model, n_vocab = len(tokens))
special_vocab.add_to_gguf(gguf_writer)
# TENSORS

2
convert-bloom-hf-to-gguf.py
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@ -129,7 +129,7 @@ gguf_writer.add_token_list(tokens)
gguf_writer.add_token_scores(scores)
gguf_writer.add_token_types(toktypes)
special_vocab = gguf.SpecialVocab(dir_model, load_merges=True)
special_vocab = gguf.SpecialVocab(dir_model, load_merges=True, n_vocab = len(tokens))
special_vocab.add_to_gguf(gguf_writer)
# TENSORS

2
convert-falcon-hf-to-gguf.py
View File

@ -152,7 +152,7 @@ gguf_writer.add_token_list(tokens)
gguf_writer.add_token_scores(scores)
gguf_writer.add_token_types(toktypes)
special_vocab = gguf.SpecialVocab(dir_model, load_merges = True)
special_vocab = gguf.SpecialVocab(dir_model, load_merges = True, n_vocab = len(tokens))
special_vocab.add_to_gguf(gguf_writer)
# TENSORS

2
convert-gptneox-hf-to-gguf.py
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@ -134,7 +134,7 @@ gguf_writer.add_token_list(tokens)
gguf_writer.add_token_scores(scores)
gguf_writer.add_token_types(toktypes)
special_vocab = gguf.SpecialVocab(dir_model, load_merges = True)
special_vocab = gguf.SpecialVocab(dir_model, load_merges = True, n_vocab = len(tokens))
special_vocab.add_to_gguf(gguf_writer)
# TENSORS

4
convert-llama-ggml-to-gguf.py
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@ -388,7 +388,9 @@ def handle_metadata(cfg, hp):
cfg.vocab_dir if cfg.vocab_dir is not None else cfg.model_metadata_dir,
cfg.vocabtype )
# FIXME: Respect cfg.vocab_dir?
svocab = gguf.SpecialVocab(cfg.model_metadata_dir)
svocab = gguf.SpecialVocab(cfg.model_metadata_dir,
load_merges = cfg.vocabtype == 'bpe',
n_vocab = vocab.vocab_size)
convert.check_vocab_size(params, vocab)
return (params, vocab, svocab)

2
convert-mpt-hf-to-gguf.py
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@ -139,7 +139,7 @@ gguf_writer.add_token_list(tokens)
gguf_writer.add_token_scores(scores)
gguf_writer.add_token_types(toktypes)
special_vocab = gguf.SpecialVocab(dir_model, load_merges = True)
special_vocab = gguf.SpecialVocab(dir_model, load_merges = True, n_vocab = len(tokens))
special_vocab.add_to_gguf(gguf_writer)
# TENSORS

2
convert-refact-hf-to-gguf.py
View File

@ -150,7 +150,7 @@ gguf_writer.add_token_list(tokens)
gguf_writer.add_token_scores(scores)
gguf_writer.add_token_types(toktypes)
special_vocab = gguf.SpecialVocab(dir_model, load_merges=True)
special_vocab = gguf.SpecialVocab(dir_model, load_merges=True, n_vocab = len(tokens))
special_vocab.add_to_gguf(gguf_writer)
# TENSORS

2
convert-starcoder-hf-to-gguf.py
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@ -122,7 +122,7 @@ gguf_writer.add_token_list(tokens)
gguf_writer.add_token_scores(scores)
gguf_writer.add_token_types(toktypes)
special_vocab = gguf.SpecialVocab(dir_model, load_merges = True)
special_vocab = gguf.SpecialVocab(dir_model, load_merges = True, n_vocab = len(tokens))
special_vocab.add_to_gguf(gguf_writer)
# TENSORS

13
convert.py
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@ -369,7 +369,7 @@ class SentencePieceVocab:
expected_ids = list(range(vocab_size, vocab_size + len(added_tokens)))
actual_ids = sorted(added_tokens.values())
if expected_ids != actual_ids:
raise Exception(f"Expected added token IDs to be sequential and start at {len(added_tokens)}; got {actual_ids}")
raise Exception(f"Expected added token IDs to be sequential and start at {vocab_size}; got {actual_ids}")
items = sorted(added_tokens.items(), key=lambda text_idx: text_idx[1])
self.added_tokens_list = [text for (text, idx) in items]
@ -1163,10 +1163,13 @@ def main(args_in: list[str] | None = None) -> None:
vocab: Vocab
if args.vocab_only:
assert args.outfile, "need --outfile if using --vocab-only"
if not args.outfile:
raise ValueError("need --outfile if using --vocab-only")
# FIXME: Try to respect vocab_dir somehow?
vocab = load_vocab(args.vocab_dir or args.model, args.vocabtype)
special_vocab = gguf.SpecialVocab(model_plus.paths[0].parent, load_merges = args.vocabtype == 'bpe')
special_vocab = gguf.SpecialVocab(model_plus.paths[0].parent,
load_merges = args.vocabtype == 'bpe',
n_vocab = vocab.vocab_size)
outfile = args.outfile
OutputFile.write_vocab_only(outfile, params, vocab, special_vocab)
print(f"Wrote {outfile}")
@ -1178,7 +1181,9 @@ def main(args_in: list[str] | None = None) -> None:
vocab_dir = args.vocab_dir if args.vocab_dir else model_plus.paths[0].parent
vocab = load_vocab(vocab_dir, args.vocabtype)
# FIXME: Try to respect vocab_dir somehow?
special_vocab = gguf.SpecialVocab(model_plus.paths[0].parent, load_merges = args.vocabtype == 'bpe')
special_vocab = gguf.SpecialVocab(model_plus.paths[0].parent,
load_merges = args.vocabtype == 'bpe',
n_vocab = vocab.vocab_size)
model = model_plus.model
model = convert_model_names(model, params)

32
gguf-py/gguf/gguf.py
View File

@ -987,12 +987,15 @@ class SpecialVocab:
merges: list[str] = []
special_token_types: tuple[str, ...] = ('bos', 'eos', 'unk', 'sep', 'pad')
special_token_ids: dict[str, int] = {}
n_vocab: int | None = None
def __init__(
self, path: str | os.PathLike[str], load_merges: bool = False,
special_token_types: tuple[str, ...] | None = None,
n_vocab: int | None = None,
):
self.special_token_ids = {}
self.n_vocab = n_vocab
self.load_merges = load_merges
if special_token_types is not None:
self.special_token_types = special_token_types
@ -1002,6 +1005,16 @@ class SpecialVocab:
if not self._try_load_from_tokenizer_json(path):
self._try_load_from_config_json(path)
def _set_special_token(self, typ: str, tid: Any):
if not isinstance(tid, int) or tid < 0:
return
if self.n_vocab is None or tid < self.n_vocab:
self.special_token_ids[typ] = tid
return
print(f'gguf: WARNING: Special token type {typ}, id {tid} out of range, must be under {self.n_vocab} - skipping',
file = sys.stderr)
def _try_load_from_tokenizer_json(self, path: Path) -> bool:
tokenizer_file = path / 'tokenizer.json'
if not tokenizer_file.is_file():
@ -1029,10 +1042,11 @@ class SpecialVocab:
tc_content = entry_content
else:
continue
for maybe_token_id in (atok.get('id') for atok in added_tokens if atok.get('content') == tc_content):
if isinstance(maybe_token_id, int) and maybe_token_id >= 0:
self.special_token_ids[typ] = maybe_token_id
break
# We only need the first match here.
maybe_token_id = next((
atok.get('id') for atok in added_tokens
if atok.get('content') == tc_content), None)
self._set_special_token(typ, maybe_token_id)
return True
def _try_load_from_config_json(self, path: Path) -> bool:
@ -1042,20 +1056,20 @@ class SpecialVocab:
with open(config_file, encoding = 'utf-8') as f:
config = json.load(f)
for typ in self.special_token_types:
maybe_token_id = config.get(f'{typ}_token_id')
if isinstance(maybe_token_id, int) and maybe_token_id >= 0:
self.special_token_ids[typ] = maybe_token_id
self._set_special_token(typ, config.get(f'{typ}_token_id'))
return True
def add_to_gguf(self, gw: GGUFWriter) -> None:
def add_to_gguf(self, gw: GGUFWriter, quiet: bool = False) -> None:
if len(self.merges) > 0:
if not quiet:
print(f'gguf: Adding {len(self.merges)} merge(s).')
gw.add_token_merges(self.merges)
for typ, tokid in self.special_token_ids.items():
handler: Callable[[int], None] | None = getattr(gw, f'add_{typ}_token_id', None)
if handler is None:
print(f'gguf: WARNING: No handler for special token type {typ} with id {tokid} - skipping')
print(f'gguf: WARNING: No handler for special token type {typ} with id {tokid} - skipping', file = sys.stderr)
continue
if not quiet:
print(f'gguf: Setting special token type {typ} to {tokid}')
handler(tokid)

37
llama.cpp
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@ -2238,15 +2238,35 @@ static void llm_load_vocab(
if (vocab.type == LLAMA_VOCAB_TYPE_SPM) {
vocab.linefeed_id = llama_byte_to_token(vocab, '\n');
} else {
vocab.linefeed_id = llama_tokenize_internal(vocab, "\u010A", false)[0];
const std::vector<int> ids = llama_tokenize_internal(vocab, "\u010A", false);
GGML_ASSERT(!ids.empty() && "model vocab missing newline token");
vocab.linefeed_id = ids[0];
}
// special tokens
GGUF_GET_KEY(ctx, vocab.special_bos_id, gguf_get_val_u32, GGUF_TYPE_UINT32, false, kv(LLM_KV_TOKENIZER_BOS_ID));
GGUF_GET_KEY(ctx, vocab.special_eos_id, gguf_get_val_u32, GGUF_TYPE_UINT32, false, kv(LLM_KV_TOKENIZER_EOS_ID));
GGUF_GET_KEY(ctx, vocab.special_unk_id, gguf_get_val_u32, GGUF_TYPE_UINT32, false, kv(LLM_KV_TOKENIZER_UNK_ID));
GGUF_GET_KEY(ctx, vocab.special_sep_id, gguf_get_val_u32, GGUF_TYPE_UINT32, false, kv(LLM_KV_TOKENIZER_SEP_ID));
GGUF_GET_KEY(ctx, vocab.special_pad_id, gguf_get_val_u32, GGUF_TYPE_UINT32, false, kv(LLM_KV_TOKENIZER_PAD_ID));
{
const std::vector<std::pair<enum llm_kv, int32_t &>> special_token_types = {
{ LLM_KV_TOKENIZER_BOS_ID, vocab.special_bos_id },
{ LLM_KV_TOKENIZER_EOS_ID, vocab.special_eos_id },
{ LLM_KV_TOKENIZER_UNK_ID, vocab.special_unk_id },
{ LLM_KV_TOKENIZER_SEP_ID, vocab.special_sep_id },
{ LLM_KV_TOKENIZER_PAD_ID, vocab.special_pad_id },
};
for (const auto & it : special_token_types) {
const std::string & key = kv(std::get<0>(it));
int32_t & id = std::get<1>(it), old_id = id;
GGUF_GET_KEY(ctx, id, gguf_get_val_u32, GGUF_TYPE_UINT32, false, key);
// Must be >= -1 and < vocab size. Since the key is unsigned, -1
// can only come from the default value, so there's no point in
// validating that.
if (size_t(id + 1) > vocab.id_to_token.size()) {
LLAMA_LOG_WARN("%s: bad special token: '%s' = %d, using default id %d\n",
__func__, key.c_str(), id, old_id);
id = old_id;
}
}
}
// build special tokens cache
{
@ -6103,11 +6123,10 @@ static uint8_t llama_token_to_byte(const llama_vocab& vocab, llama_token id) {
}
static llama_token llama_byte_to_token(const llama_vocab & vocab, uint8_t ch) {
static const char * hex = "0123456789ABCDEF";
switch (llama_vocab_get_type(vocab)) {
case LLAMA_VOCAB_TYPE_SPM: {
char buf[7];
int result = snprintf(buf, sizeof(buf), "<0x%02X>", ch);
GGML_ASSERT(0 <= result && result < 7);
const char buf[7] = { '<', '0', 'x', hex[ch >> 4], hex[ch & 15], '>', 0 };
return vocab.token_to_id.at(buf);
}
case LLAMA_VOCAB_TYPE_BPE: {