big-module.rs - mozsearch

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use std::borrow::Cow;

use wasm_encoder::*;

#[test]

fn big_type_indices() {

    const N: u32 = 100_000;

    let mut module = Module::new();

    let mut types = TypeSection::new();

    for _ in 0..N {

        types.ty().function([], []);

    module.section(&types);

    let mut funcs = FunctionSection::new();

    funcs.function(N - 1);

    module.section(&funcs);

    let mut elems = ElementSection::new();

    elems.declared(Elements::Functions(Cow::Borrowed(&[0])));

    module.section(&elems);

    let mut code = CodeSection::new();

    let mut body = Function::new([]);

    body.instruction(&Instruction::RefFunc(0));

    body.instruction(&Instruction::Drop);

    body.instruction(&Instruction::End);

    code.function(&body);

    module.section(&code);

    let wasm = module.finish();

    wasmparser::Validator::default()

        .validate_all(&wasm)

        .unwrap();