wasmtime_cli/commands/
wast.rs

1//! The module that implements the `wasmtime wast` command.
2
3use anyhow::{Context as _, Result};
4use clap::Parser;
5use std::path::PathBuf;
6use wasmtime::{Engine, Store};
7use wasmtime_cli_flags::CommonOptions;
8use wasmtime_wast::{SpectestConfig, WastContext};
9
10/// Runs a WebAssembly test script file
11#[derive(Parser)]
12pub struct WastCommand {
13    #[command(flatten)]
14    common: CommonOptions,
15
16    /// The path of the WebAssembly test script to run
17    #[arg(required = true, value_name = "SCRIPT_FILE")]
18    scripts: Vec<PathBuf>,
19
20    /// Whether or not to generate DWARF debugging information in text-to-binary
21    /// transformations to show line numbers in backtraces.
22    #[arg(long, require_equals = true, value_name = "true|false")]
23    generate_dwarf: Option<Option<bool>>,
24
25    /// Saves precompiled versions of modules to this path instead of running
26    /// tests.
27    #[arg(long)]
28    precompile_save: Option<PathBuf>,
29
30    /// Load precompiled modules from the specified directory instead of
31    /// compiling natively.
32    #[arg(long)]
33    precompile_load: Option<PathBuf>,
34}
35
36impl WastCommand {
37    /// Executes the command.
38    pub fn execute(mut self) -> Result<()> {
39        self.common.init_logging()?;
40
41        let mut config = self.common.config(None)?;
42        config.async_support(true);
43        let mut store = Store::new(&Engine::new(&config)?, ());
44        if let Some(fuel) = self.common.wasm.fuel {
45            store.set_fuel(fuel)?;
46        }
47        if let Some(true) = self.common.wasm.epoch_interruption {
48            store.epoch_deadline_trap();
49            store.set_epoch_deadline(1);
50        }
51        let mut wast_context = WastContext::new(store, wasmtime_wast::Async::Yes);
52
53        wast_context.generate_dwarf(optional_flag_with_default(self.generate_dwarf, true));
54        wast_context
55            .register_spectest(&SpectestConfig {
56                use_shared_memory: true,
57                suppress_prints: false,
58            })
59            .expect("error instantiating \"spectest\"");
60
61        if let Some(path) = &self.precompile_save {
62            wast_context.precompile_save(path);
63        }
64        if let Some(path) = &self.precompile_load {
65            wast_context.precompile_load(path);
66        }
67
68        for script in self.scripts.iter() {
69            wast_context
70                .run_file(script)
71                .with_context(|| format!("failed to run script file '{}'", script.display()))?;
72        }
73
74        Ok(())
75    }
76}
77
78fn optional_flag_with_default(flag: Option<Option<bool>>, default: bool) -> bool {
79    match flag {
80        None => default,
81        Some(None) => true,
82        Some(Some(val)) => val,
83    }
84}
wasmtime_cli/commands/wast.rs

wasmtime_cli/commands/
wast.rs
