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Minimize unsafe block to unsafe code

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This commit is contained in:
Brandon Fish
2019-08-10 17:20:27 -06:00
parent b7970fb982
commit 38a8a0eb01
1 changed files with 11 additions and 15 deletions
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26
lib/runtime-core/src/backing.rs
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@ -159,14 +159,12 @@ impl LocalBacking {
LocalOrImport::Import(imported_memory_index) => { LocalOrImport::Import(imported_memory_index) => {
// Write the initialization data to the memory that // Write the initialization data to the memory that
// we think the imported memory is. // we think the imported memory is.
unsafe { let local_memory = unsafe { &*imports.vm_memories[imported_memory_index] };
let local_memory = &*imports.vm_memories[imported_memory_index]; let data_top = init_base + init.data.len();
let data_top = init_base + init.data.len(); if local_memory.bound < data_top || data_top < init_base {
if local_memory.bound < data_top || data_top < init_base { return Err(vec![LinkError::Generic {
return Err(vec![LinkError::Generic { message: "data segment does not fit".to_string(),
message: "data segment does not fit".to_string(), }]);
}]);
}
} }
} }
} }
@ -199,15 +197,13 @@ impl LocalBacking {
LocalOrImport::Import(imported_memory_index) => { LocalOrImport::Import(imported_memory_index) => {
// Write the initialization data to the memory that // Write the initialization data to the memory that
// we think the imported memory is. // we think the imported memory is.
unsafe { let memory_slice = unsafe {
let local_memory = &*imports.vm_memories[imported_memory_index]; let local_memory = &*imports.vm_memories[imported_memory_index];
let memory_slice = slice::from_raw_parts_mut(local_memory.base, local_memory.bound)
slice::from_raw_parts_mut(local_memory.base, local_memory.bound); };
let mem_init_view = let mem_init_view = &mut memory_slice[init_base..init_base + init.data.len()];
&mut memory_slice[init_base..init_base + init.data.len()]; mem_init_view.copy_from_slice(&init.data);
mem_init_view.copy_from_slice(&init.data);
}
} }
} }
} }