mirror of
https://github.com/denoland/deno.git
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58 lines
1.4 KiB
Rust
58 lines
1.4 KiB
Rust
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use deno_core::Snapshot;
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use log::debug;
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use once_cell::sync::Lazy;
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pub static CLI_SNAPSHOT: Lazy<Box<[u8]>> = Lazy::new(
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#[allow(clippy::uninit_vec)]
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#[cold]
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#[inline(never)]
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static COMPRESSED_CLI_SNAPSHOT: &[u8] =
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include_bytes!(concat!(env!("OUT_DIR"), "/CLI_SNAPSHOT.bin"));
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let size =
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u32::from_le_bytes(COMPRESSED_CLI_SNAPSHOT[0..4].try_into().unwrap())
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as usize;
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let mut vec = Vec::with_capacity(size);
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// SAFETY: vec is allocated with exact snapshot size (+ alignment)
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// SAFETY: non zeroed bytes are overwritten with decompressed snapshot
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unsafe {
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vec.set_len(size);
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}
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lzzzz::lz4::decompress(&COMPRESSED_CLI_SNAPSHOT[4..], &mut vec).unwrap();
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vec.into_boxed_slice()
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},
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);
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pub fn deno_isolate_init() -> Snapshot {
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debug!("Deno isolate init with snapshots.");
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Snapshot::Static(&CLI_SNAPSHOT)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn runtime_snapshot() {
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let mut js_runtime = deno_core::JsRuntime::new(deno_core::RuntimeOptions {
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startup_snapshot: Some(deno_isolate_init()),
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..Default::default()
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});
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js_runtime
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.execute_script(
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"<anon>",
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r#"
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if (!(bootstrap.mainRuntime && bootstrap.workerRuntime)) {
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throw Error("bad");
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}
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console.log("we have console.log!!!");
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"#,
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)
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.unwrap();
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}
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}
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