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llama2c : fix segfault and alloc-dealloc-mismatch (#2913)

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* llama2c : fix segfault if vocab is not found

* llama2c : fix mismatch between new[] and delete

* llama2c : fix basename on Windows

* llama2c : use a destructor to prevent memory leaks
This commit is contained in:
Cebtenzzre 2023-09-01 05:03:49 -04:00 committed by GitHub
parent e8d9158925
commit 18705a30ef
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1 changed files with 23 additions and 20 deletions
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43
examples/convert-llama2c-to-ggml/convert-llama2c-to-ggml.cpp
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@ -75,7 +75,7 @@ typedef struct {
int seq_len; // max sequence length
} Config;
typedef struct {
struct TransformerWeights {
// token embedding table
float* token_embedding_table; // (vocab_size, dim)
// weights for rmsnorms
@ -97,7 +97,22 @@ typedef struct {
// float* freq_cis_imag; // (seq_len, dim/2)
// (optional) classifier weights for the logits, on the last layer
float* wcls;
} TransformerWeights;
~TransformerWeights() {
delete[] token_embedding_table;
delete[] rms_att_weight;
delete[] rms_ffn_weight;
delete[] wq;
delete[] wk;
delete[] wv;
delete[] wo;
delete[] w1;
delete[] w2;
delete[] w3;
delete[] rms_final_weight;
delete[] wcls;
}
};
void malloc_weights(TransformerWeights* w, Config* p, bool shared_weights) {
// we calloc instead of malloc to keep valgrind happy
@ -173,21 +188,6 @@ int checkpoint_init_weights(TransformerWeights *w, Config* p, FILE* f, bool shar
return 0;
}
void free_weights(TransformerWeights* w) {
delete w->token_embedding_table;
delete w->rms_att_weight;
delete w->rms_ffn_weight;
delete w->wq;
delete w->wk;
delete w->wv;
delete w->wo;
delete w->w1;
delete w->w2;
delete w->w3;
delete w->rms_final_weight;
if (w->wcls) delete w->wcls;
}
void print_sample_weights(TransformerWeights *w){
printf("----- Quick print of first of the weight vales of all the variables\n");
printf("%f\n", w->token_embedding_table[0]);
@ -596,6 +596,10 @@ void load_vocab(const char *filename, Config *config, struct llama_vocab *vocab)
// assume llama2.c vocabulary
printf("Assuming llama2.c vocabulary since %s is not a gguf file\n", filename);
llama_file file(filename, "rb");
if (!file.fp) {
fprintf(stderr, "error: %s: %s\n", strerror(errno), filename);
exit(1);
}
const int n_vocab = config->vocab_size;
/* uint32_t max_token_length = */ file.read_u32(); // unused
vocab->id_to_token.resize(n_vocab);
@ -898,7 +902,7 @@ bool params_parse(int argc, char ** argv, struct train_params * params) {
}
std::string basename(const std::string &path) {
size_t pos = path.find_last_of("/");
size_t pos = path.find_last_of("/\\");
if (pos == std::string::npos) {
return path;
}
@ -911,7 +915,7 @@ int main(int argc, char ** argv) {
return 1;
}
Config config;
TransformerWeights weights;
TransformerWeights weights = {};
{
FILE *file = fopen(params.fn_llama2c_model, "rb");
if (!file) { printf("Unable to open the checkpoint file %s!\n", params.fn_llama2c_model); return 1; }
@ -953,6 +957,5 @@ int main(int argc, char ** argv) {
printf("Saving llama.c model file %s in ggml format at %s\n", params.fn_llama2c_model, params.fn_llama2c_output_model);
ggml_free(model.ctx);
free_weights(&weights);
return 0;
}