wasmtime_cli/commands/
wast.rs

1//! The module that implements the `wasmtime wast` command.
2
3use clap::Parser;
4use std::path::PathBuf;
5use wasmtime::{Engine, Result, error::Context as _};
6use wasmtime_cli_flags::CommonOptions;
7use wasmtime_wast::{SpectestConfig, WastContext};
8
9/// Runs a WebAssembly test script file
10#[derive(Parser)]
11pub struct WastCommand {
12    #[command(flatten)]
13    common: CommonOptions,
14
15    /// The path of the WebAssembly test script to run
16    #[arg(required = true, value_name = "SCRIPT_FILE")]
17    scripts: Vec<PathBuf>,
18
19    /// Whether or not to generate DWARF debugging information in text-to-binary
20    /// transformations to show line numbers in backtraces.
21    #[arg(long, require_equals = true, value_name = "true|false")]
22    generate_dwarf: Option<Option<bool>>,
23
24    /// Saves precompiled versions of modules to this path instead of running
25    /// tests.
26    #[arg(long)]
27    precompile_save: Option<PathBuf>,
28
29    /// Load precompiled modules from the specified directory instead of
30    /// compiling natively.
31    #[arg(long)]
32    precompile_load: Option<PathBuf>,
33
34    /// Whether or not to run wasm in async mode.
35    ///
36    /// This is enabled by default but disabling it may be useful when testing
37    /// Wasmtime itself.
38    #[arg(long = "async", require_equals = true, value_name = "true|false")]
39    async_: Option<Option<bool>>,
40}
41
42impl WastCommand {
43    /// Executes the command.
44    pub fn execute(mut self) -> Result<()> {
45        self.common.init_logging()?;
46
47        let async_ = optional_flag_with_default(self.async_, true);
48        let mut config = self.common.config(None)?;
49        config.shared_memory(true);
50        let engine = Engine::new(&config)?;
51        let mut wast_context = WastContext::new(
52            &engine,
53            if async_ {
54                wasmtime_wast::Async::Yes
55            } else {
56                wasmtime_wast::Async::No
57            },
58            move |store| {
59                if let Some(fuel) = self.common.wasm.fuel {
60                    store.set_fuel(fuel).unwrap();
61                }
62                if let Some(true) = self.common.wasm.epoch_interruption {
63                    store.epoch_deadline_trap();
64                    store.set_epoch_deadline(1);
65                }
66            },
67        );
68
69        wast_context.generate_dwarf(optional_flag_with_default(self.generate_dwarf, true));
70        wast_context
71            .register_spectest(&SpectestConfig {
72                use_shared_memory: true,
73                suppress_prints: false,
74            })
75            .expect("error instantiating \"spectest\"");
76
77        if let Some(path) = &self.precompile_save {
78            wast_context.precompile_save(path);
79        }
80        if let Some(path) = &self.precompile_load {
81            wast_context.precompile_load(path);
82        }
83
84        for script in self.scripts.iter() {
85            wast_context
86                .run_file(script)
87                .with_context(|| format!("failed to run script file '{}'", script.display()))?;
88        }
89
90        Ok(())
91    }
92}
93
94fn optional_flag_with_default(flag: Option<Option<bool>>, default: bool) -> bool {
95    match flag {
96        None => default,
97        Some(None) => true,
98        Some(Some(val)) => val,
99    }
100}
wasmtime_cli/commands/wast.rs

wasmtime_cli/commands/
wast.rs
