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fixed bad memory access exception on ios 17 #3527

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fixed bad memory access exception on ios 17 #3527

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4c3a7cd
fixed bad memory access exception on ios 17
l3utterfly Oct 7, 2023
cd0022f
added GGML_ALLOCATOR_DEBUG code back
l3utterfly Oct 7, 2023
88a14fc
fixed logic error, should not allocate more memory, and instead updat…
l3utterfly Oct 7, 2023
9ee8aec
fixed memory leak by freeing temporary graph during session load
l3utterfly Oct 7, 2023
cbf6d07
Merge branch 'master' into mem-fix-ios17
l3utterfly Oct 12, 2023
cb58690
reverted changes in ggml.c
l3utterfly Oct 12, 2023
6f553d9
added trailing newlines
l3utterfly Oct 12, 2023
c8159ea
removed trailing whitespaces
l3utterfly Oct 12, 2023
0ae5b1a
removed trailing whitespace
l3utterfly Oct 12, 2023
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52 changes: 44 additions & 8 deletions llama.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -9001,7 +9001,21 @@ static void llama_copy_state_data_internal(struct llama_context * ctx, llama_dat
const size_t elt_size = ggml_element_size(kv_self.k);

ggml_context * cpy_ctx = ggml_init({ 4096, NULL, /* no_alloc */ true });
ggml_cgraph gf{};

// create a temporary cgraph without initialising ggml objects, code inspired from `ggml.c:ggml_new_graph`
struct ggml_cgraph * gf = (struct ggml_cgraph *) (malloc(sizeof(ggml_cgraph)));

(*gf).n_nodes = 0;
(*gf).n_leafs = 0;
(*gf).order = GGML_CGRAPH_EVAL_ORDER_LEFT_TO_RIGHT;
(*gf).perf_runs = 0;
(*gf).perf_cycles = 0;
(*gf).perf_time_us = 0;

memset((*gf).nodes, 0, sizeof((*gf).nodes));
memset((*gf).grads, 0, sizeof((*gf).grads));
memset((*gf).leafs, 0, sizeof((*gf).leafs));
memset((*gf).visited_hash_table, 0, sizeof((*gf).visited_hash_table));

ggml_tensor * kout3d = ggml_new_tensor_3d(cpy_ctx, kv_self.k->type, n_embd, kv_head, n_layer);
std::vector<uint8_t> kout3d_data(ggml_nbytes(kout3d), 0);
Expand All @@ -9019,16 +9033,20 @@ static void llama_copy_state_data_internal(struct llama_context * ctx, llama_dat
kv_head, n_embd, n_layer,
elt_size*n_ctx, elt_size*n_ctx*n_embd, 0);

ggml_build_forward_expand(&gf, ggml_cpy(cpy_ctx, k3d, kout3d));
ggml_build_forward_expand(&gf, ggml_cpy(cpy_ctx, v3d, vout3d));
ggml_graph_compute_helper(ctx->work_buffer, &gf, /*n_threads*/ 1);
ggml_build_forward_expand(gf, ggml_cpy(cpy_ctx, k3d, kout3d));
ggml_build_forward_expand(gf, ggml_cpy(cpy_ctx, v3d, vout3d));
ggml_graph_compute_helper(ctx->work_buffer, gf, /*n_threads*/ 1);

ggml_free(cpy_ctx);

// our data is now in the kout3d_data and vout3d_data buffers
// write them to file
data_ctx->write(kout3d_data.data(), kout3d_data.size());
data_ctx->write(vout3d_data.data(), vout3d_data.size());

// free our allocated graph
free(gf);
gf = NULL;
}

for (uint32_t i = 0; i < kv_size; ++i) {
Expand Down Expand Up @@ -9129,7 +9147,21 @@ size_t llama_set_state_data(struct llama_context * ctx, uint8_t * src) {
const size_t elt_size = ggml_element_size(kv_self.k);

ggml_context * cpy_ctx = ggml_init({ 4096, NULL, /* no_alloc */ true });
ggml_cgraph gf{};

// create a temporary cgraph without initialising ggml objects, code inspired from `ggml.c:ggml_new_graph`
struct ggml_cgraph * gf = (struct ggml_cgraph *) (malloc(sizeof(ggml_cgraph)));

(*gf).n_nodes = 0;
(*gf).n_leafs = 0;
(*gf).order = GGML_CGRAPH_EVAL_ORDER_LEFT_TO_RIGHT;
(*gf).perf_runs = 0;
(*gf).perf_cycles = 0;
(*gf).perf_time_us = 0;

memset((*gf).nodes, 0, sizeof((*gf).nodes));
memset((*gf).grads, 0, sizeof((*gf).grads));
memset((*gf).leafs, 0, sizeof((*gf).leafs));
memset((*gf).visited_hash_table, 0, sizeof((*gf).visited_hash_table));

ggml_tensor * kin3d = ggml_new_tensor_3d(cpy_ctx, kv_self.k->type, n_embd, kv_head, n_layer);
kin3d->data = (void *) inp;
Expand All @@ -9147,11 +9179,15 @@ size_t llama_set_state_data(struct llama_context * ctx, uint8_t * src) {
kv_head, n_embd, n_layer,
elt_size*n_ctx, elt_size*n_ctx*n_embd, 0);

ggml_build_forward_expand(&gf, ggml_cpy(cpy_ctx, kin3d, k3d));
ggml_build_forward_expand(&gf, ggml_cpy(cpy_ctx, vin3d, v3d));
ggml_graph_compute_helper(ctx->work_buffer, &gf, /*n_threads*/ 1);
ggml_build_forward_expand(gf, ggml_cpy(cpy_ctx, kin3d, k3d));
ggml_build_forward_expand(gf, ggml_cpy(cpy_ctx, vin3d, v3d));
ggml_graph_compute_helper(ctx->work_buffer, gf, /*n_threads*/ 1);

ggml_free(cpy_ctx);

// free our allocated graph
free(gf);
gf = NULL;
}

ctx->kv_self.head = kv_head;
Expand Down
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