24 lines
805 B
Rust
24 lines
805 B
Rust
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use rustc::ty::{layout::{Size, Align}, TyCtxt};
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use rustc_mir::interpret::Memory;
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use crate::*;
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pub(crate) fn alloc_env_value<'mir, 'tcx>(bytes: &[u8], memory: &mut Memory<'mir, 'tcx, Evaluator<'tcx>>, tcx: &TyCtxt<'tcx>) -> Pointer<Tag> {
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let length = bytes.len() as u64;
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// `+1` for the null terminator.
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let ptr = memory.allocate(
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Size::from_bytes(length + 1),
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Align::from_bytes(1).unwrap(),
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MiriMemoryKind::Env.into(),
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);
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// We just allocated these, so the write cannot fail.
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let alloc = memory.get_mut(ptr.alloc_id).unwrap();
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alloc.write_bytes(tcx, ptr, &bytes).unwrap();
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let trailing_zero_ptr = ptr.offset(
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Size::from_bytes(length),
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tcx,
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).unwrap();
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alloc.write_bytes(tcx, trailing_zero_ptr, &[0]).unwrap();
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ptr
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}
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