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rpc : fix load/store misaligned addresses #7948

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merged 1 commit into from
Jun 17, 2024
Merged

rpc : fix load/store misaligned addresses #7948

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11 changes: 8 additions & 3 deletions ggml-rpc.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -73,9 +73,13 @@ struct rpc_tensor {
uint64_t view_offs;
uint64_t data;
char name[GGML_MAX_NAME];

char padding[4];
};
#pragma pack(pop)

static_assert(sizeof(rpc_tensor) % 8 == 0, "rpc_tensor size must be multiple of 8");

// RPC commands
enum rpc_cmd {
ALLOC_BUFFER = 0,
Expand Down Expand Up @@ -599,9 +603,8 @@ static void serialize_graph(const ggml_cgraph * cgraph, std::vector<uint8_t> & o
int output_size = sizeof(uint32_t) + n_nodes * sizeof(uint64_t) + sizeof(uint32_t) + n_tensors * sizeof(rpc_tensor);
output.resize(output_size, 0);
memcpy(output.data(), &n_nodes, sizeof(n_nodes));
uint64_t * out_nodes = (uint64_t *)(output.data() + sizeof(n_nodes));
for (uint32_t i = 0; i < n_nodes; i++) {
out_nodes[i] = reinterpret_cast<uint64_t>(cgraph->nodes[i]);
memcpy(output.data() + sizeof(n_nodes) + i * sizeof(uint64_t), &cgraph->nodes[i], sizeof(uint64_t));
}
uint32_t * out_ntensors = (uint32_t *)(output.data() + sizeof(n_nodes) + n_nodes * sizeof(uint64_t));
*out_ntensors = n_tensors;
Expand Down Expand Up @@ -1036,7 +1039,9 @@ bool rpc_server::graph_compute(const std::vector<uint8_t> & input, std::vector<u
}
std::unordered_map<uint64_t, ggml_tensor*> tensor_map;
for (uint32_t i = 0; i < n_nodes; i++) {
graph->nodes[i] = create_node(nodes[i], ctx, tensor_ptrs, tensor_map);
int64_t id;
memcpy(&id, &nodes[i], sizeof(id));
graph->nodes[i] = create_node(id, ctx, tensor_ptrs, tensor_map);
}
ggml_status status = ggml_backend_graph_compute(backend, graph);
// output serialization format: | status (1 byte) |
Expand Down
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