2018-11-25 09:08:24 -06:00
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#![feature(inner_deref)]
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2017-01-24 06:28:36 -06:00
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extern crate cargo_metadata;
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use std::path::{PathBuf, Path};
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2018-12-15 08:08:03 -06:00
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use std::io::{self, Write, BufRead};
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2017-01-24 06:28:36 -06:00
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use std::process::Command;
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2018-11-25 10:09:49 -06:00
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use std::fs::{self, File};
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2017-01-24 06:28:36 -06:00
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const CARGO_MIRI_HELP: &str = r#"Interprets bin crates
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Usage:
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2018-11-25 09:30:11 -06:00
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cargo miri [subcommand] [options] [--] [<opts>...]
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Subcommands:
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run Run binaries (default)
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test Run tests
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setup Only perform automatic setup, but without asking questions (for getting a proper libstd)
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2017-01-24 06:28:36 -06:00
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Common options:
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-h, --help Print this message
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--features Features to compile for the package
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-V, --version Print version info and exit
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Other options are the same as `cargo rustc`.
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The feature `cargo-miri` is automatically defined for convenience. You can use
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it to configure the resource limits
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#![cfg_attr(feature = "cargo-miri", memory_size = 42)]
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available resource limits are `memory_size`, `step_limit`, `stack_limit`
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"#;
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2018-11-25 09:30:11 -06:00
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#[derive(Copy, Clone, Debug, PartialEq, Eq)]
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2018-11-25 09:08:24 -06:00
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enum MiriCommand {
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Run,
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Test,
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Setup,
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}
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2017-01-24 06:28:36 -06:00
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fn show_help() {
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println!("{}", CARGO_MIRI_HELP);
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}
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fn show_version() {
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2018-09-16 08:06:05 -05:00
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println!("miri {} ({} {})",
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env!("CARGO_PKG_VERSION"), env!("VERGEN_SHA_SHORT"), env!("VERGEN_COMMIT_DATE"));
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2017-01-24 06:28:36 -06:00
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}
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2018-11-25 09:30:11 -06:00
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fn show_error(msg: String) -> ! {
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eprintln!("fatal error: {}", msg);
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std::process::exit(1)
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}
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2018-12-10 02:23:27 -06:00
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fn get_arg_flag_value(name: &str) -> Option<String> {
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// stop searching at `--`
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let mut args = std::env::args().skip_while(|val| !(val.starts_with(name) || val == "--"));
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match args.next() {
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Some(ref p) if p == "--" => None,
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Some(ref p) if p == name => args.next(),
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Some(p) => {
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// Make sure this really starts with `$name=`, we didn't test for the `=` yet.
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let v = &p[name.len()..]; // strip leading `$name`
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if v.starts_with('=') {
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Some(v[1..].to_owned()) // strip leading `=`
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} else {
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None
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}
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},
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None => None,
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}
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}
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fn list_targets() -> impl Iterator<Item=cargo_metadata::Target> {
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2018-11-25 09:08:24 -06:00
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// We need to get the manifest, and then the metadata, to enumerate targets.
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2018-12-10 03:52:59 -06:00
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let manifest_path = get_arg_flag_value("--manifest-path").map(|m|
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Path::new(&m).canonicalize().unwrap()
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);
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2018-11-25 09:08:24 -06:00
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let mut metadata = if let Ok(metadata) = cargo_metadata::metadata(
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2018-12-10 02:23:27 -06:00
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manifest_path.as_ref().map(AsRef::as_ref),
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2018-11-25 09:08:24 -06:00
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)
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{
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metadata
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} else {
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2018-11-27 01:16:52 -06:00
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show_error(format!("error: Could not obtain cargo metadata."));
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2018-11-25 09:08:24 -06:00
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};
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let current_dir = std::env::current_dir();
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let package_index = metadata
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.packages
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.iter()
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.position(|package| {
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let package_manifest_path = Path::new(&package.manifest_path);
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if let Some(ref manifest_path) = manifest_path {
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package_manifest_path == manifest_path
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} else {
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let current_dir = current_dir.as_ref().expect(
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"could not read current directory",
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);
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let package_manifest_directory = package_manifest_path.parent().expect(
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"could not find parent directory of package manifest",
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);
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package_manifest_directory == current_dir
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}
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})
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.expect("could not find matching package");
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let package = metadata.packages.remove(package_index);
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// Finally we got the list of targets to build
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package.targets.into_iter()
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}
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2018-12-15 08:08:03 -06:00
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fn xargo_version() -> Option<(u32, u32, u32)> {
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let out = Command::new("xargo").arg("--version").output().ok()?;
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if !out.status.success() {
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return None;
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}
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// Parse output. The first line looks like "xargo 0.3.12 (b004f1c 2018-12-13)".
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let line = out.stderr.lines().nth(0)
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.expect("malformed `xargo --version` output: not at least one line")
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.expect("malformed `xargo --version` output: error reading first line");
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2018-12-19 01:41:31 -06:00
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let (name, version) = {
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let mut split = line.split(' ');
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(split.next().expect("malformed `xargo --version` output: empty"),
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split.next().expect("malformed `xargo --version` output: not at least two words"))
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};
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if name != "xargo" {
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panic!("malformed `xargo --version` output: application name is not `xargo`");
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}
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2018-12-15 08:08:03 -06:00
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let mut version_pieces = version.split('.');
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let major = version_pieces.next()
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.expect("malformed `xargo --version` output: not a major version piece")
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.parse()
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.expect("malformed `xargo --version` output: major version is not an integer");
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let minor = version_pieces.next()
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.expect("malformed `xargo --version` output: not a minor version piece")
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.parse()
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.expect("malformed `xargo --version` output: minor version is not an integer");
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let patch = version_pieces.next()
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.expect("malformed `xargo --version` output: not a patch version piece")
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.parse()
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.expect("malformed `xargo --version` output: patch version is not an integer");
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if !version_pieces.next().is_none() {
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panic!("malformed `xargo --version` output: more than three pieces in version");
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}
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Some((major, minor, patch))
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}
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2018-11-25 09:30:11 -06:00
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fn ask(question: &str) {
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let mut buf = String::new();
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print!("{} [Y/n] ", question);
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io::stdout().flush().unwrap();
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io::stdin().read_line(&mut buf).unwrap();
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2018-11-27 01:16:52 -06:00
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match buf.trim().to_lowercase().as_ref() {
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"" | "y" | "yes" => {}, // proceed
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"n" | "no" => show_error(format!("Aborting as per your request")),
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2018-11-25 09:30:11 -06:00
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a => show_error(format!("I do not understand `{}`", a))
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};
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}
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/// Perform the setup requires to make `cargo miri` work: Getting a custom-built libstd. Then sets MIRI_SYSROOT.
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/// Skipped if MIRI_SYSROOT is already set, in that case we expect the user has done all this already.
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fn setup(ask_user: bool) {
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if std::env::var("MIRI_SYSROOT").is_ok() {
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return;
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}
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// First, we need xargo
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2018-12-15 08:08:03 -06:00
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let xargo = xargo_version();
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if xargo.map_or(true, |v| v < (0, 3, 13)) {
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2018-11-25 09:30:11 -06:00
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if ask_user {
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2018-12-15 08:08:03 -06:00
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ask("It seems you do not have a recent enough xargo installed. I will run `cargo install xargo -f`. Proceed?");
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2018-11-25 15:29:25 -06:00
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} else {
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2018-12-15 08:08:03 -06:00
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println!("Installing xargo: `cargo install xargo -f`");
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2018-11-25 09:30:11 -06:00
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}
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2018-12-18 12:41:32 -06:00
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if !Command::new("cargo").args(&["install", "xargo", "-f"]).status().unwrap().success() {
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2018-11-25 09:30:11 -06:00
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show_error(format!("Failed to install xargo"));
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}
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}
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2018-11-25 10:09:49 -06:00
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// Then, we also need rust-src. Let's see if it is already installed.
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let sysroot = Command::new("rustc").args(&["--print", "sysroot"]).output().unwrap().stdout;
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let sysroot = std::str::from_utf8(&sysroot[..]).unwrap();
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2018-11-25 10:30:50 -06:00
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let src = Path::new(sysroot.trim_end_matches('\n')).join("lib").join("rustlib").join("src");
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2018-11-25 10:09:49 -06:00
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if !src.exists() {
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if ask_user {
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ask("It seems you do not have the rust-src component installed. I will run `rustup component add rust-src`. Proceed?");
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2018-11-25 15:29:25 -06:00
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} else {
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println!("Installing rust-src component: `rustup component add rust-src`");
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2018-11-25 10:09:49 -06:00
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}
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if !Command::new("rustup").args(&["component", "add", "rust-src"]).status().unwrap().success() {
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show_error(format!("Failed to install rust-src component"));
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}
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}
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2018-11-27 04:26:53 -06:00
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// Next, we need our own libstd. We will do this work in whatever is a good cache dir for this platform.
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let dirs = directories::ProjectDirs::from("miri", "miri", "miri").unwrap();
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let dir = dirs.cache_dir();
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2018-11-25 10:09:49 -06:00
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if !dir.exists() {
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2018-11-27 04:43:02 -06:00
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fs::create_dir_all(&dir).unwrap();
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2018-11-25 10:09:49 -06:00
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}
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// The interesting bit: Xargo.toml
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File::create(dir.join("Xargo.toml")).unwrap()
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.write_all(br#"
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[dependencies.std]
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2018-12-02 07:03:29 -06:00
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default_features = false
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# We need the `panic_unwind` feature because we use the `unwind` panic strategy.
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# Using `abort` works for libstd, but then libtest will not compile.
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2018-11-26 01:37:31 -06:00
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features = ["panic_unwind"]
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2018-11-25 10:09:49 -06:00
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[dependencies.test]
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stage = 1
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"#).unwrap();
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// The boring bits: A dummy project for xargo
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File::create(dir.join("Cargo.toml")).unwrap()
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.write_all(br#"
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[package]
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name = "miri-xargo"
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description = "A dummy project for building libstd with xargo."
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version = "0.0.0"
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[lib]
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path = "lib.rs"
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"#).unwrap();
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File::create(dir.join("lib.rs")).unwrap();
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// Run xargo
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2018-12-10 02:32:54 -06:00
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let target = get_arg_flag_value("--target");
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let mut command = Command::new("xargo");
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command.arg("build").arg("-q")
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2018-11-25 10:09:49 -06:00
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.current_dir(&dir)
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.env("RUSTFLAGS", miri::miri_default_args().join(" "))
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2018-12-10 02:32:54 -06:00
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.env("XARGO_HOME", dir.to_str().unwrap());
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if let Some(ref target) = target {
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command.arg("--target").arg(&target);
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}
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if !command.status().unwrap().success()
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2018-11-25 10:09:49 -06:00
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{
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show_error(format!("Failed to run xargo"));
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}
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2018-12-10 02:32:54 -06:00
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// That should be it! But we need to figure out where xargo built stuff.
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// Unfortunately, it puts things into a different directory when the
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// architecture matches the host.
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let is_host = match target {
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None => true,
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Some(target) => target == rustc_version::version_meta().unwrap().host,
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};
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let sysroot = if is_host { dir.join("HOST") } else { PathBuf::from(dir) };
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2018-11-30 02:23:44 -06:00
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std::env::set_var("MIRI_SYSROOT", &sysroot);
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if !ask_user {
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println!("A libstd for miri is now available in `{}`", sysroot.display());
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}
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2018-11-25 09:30:11 -06:00
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}
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2017-01-24 06:28:36 -06:00
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fn main() {
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// Check for version and help flags even when invoked as 'cargo-miri'
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if std::env::args().any(|a| a == "--help" || a == "-h") {
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show_help();
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return;
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}
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if std::env::args().any(|a| a == "--version" || a == "-V") {
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show_version();
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return;
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}
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if let Some("miri") = std::env::args().nth(1).as_ref().map(AsRef::as_ref) {
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2018-11-19 15:59:41 -06:00
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// this arm is when `cargo miri` is called. We call `cargo rustc` for
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// each applicable target, but with the RUSTC env var set to the `cargo-miri`
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// binary so that we come back in the other branch, and dispatch
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// the invocations to rustc and miri, respectively.
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2017-01-24 06:28:36 -06:00
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2018-11-25 09:08:24 -06:00
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let (subcommand, skip) = match std::env::args().nth(2).deref() {
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Some("test") => (MiriCommand::Test, 3),
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Some("run") => (MiriCommand::Run, 3),
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Some("setup") => (MiriCommand::Setup, 3),
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// Default command, if there is an option or nothing
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Some(s) if s.starts_with("-") => (MiriCommand::Run, 2),
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None => (MiriCommand::Run, 2),
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// Unvalid command
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Some(s) => {
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2018-11-25 09:30:11 -06:00
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show_error(format!("Unknown command `{}`", s))
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2018-11-25 09:08:24 -06:00
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}
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2017-01-24 06:28:36 -06:00
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};
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2018-11-25 09:30:11 -06:00
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// We always setup
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let ask = subcommand != MiriCommand::Setup;
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setup(ask);
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2018-12-02 03:29:57 -06:00
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if subcommand == MiriCommand::Setup {
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// Stop here.
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return;
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}
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2018-11-25 09:30:11 -06:00
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// Now run the command.
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2018-12-10 02:23:27 -06:00
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for target in list_targets() {
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2017-01-24 08:33:51 -06:00
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let args = std::env::args().skip(skip);
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2017-08-10 10:48:38 -05:00
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let kind = target.kind.get(0).expect(
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"badly formatted cargo metadata: target::kind is an empty array",
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);
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2018-11-25 09:08:24 -06:00
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match (subcommand, &kind[..]) {
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(MiriCommand::Test, "test") => {
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2018-10-16 13:06:24 -05:00
|
|
|
// For test binaries we call `cargo rustc --test target -- <rustc args>`
|
2018-10-15 13:38:07 -05:00
|
|
|
if let Err(code) = process(
|
|
|
|
vec!["--test".to_string(), target.name].into_iter().chain(
|
|
|
|
args,
|
|
|
|
),
|
|
|
|
)
|
|
|
|
{
|
|
|
|
std::process::exit(code);
|
|
|
|
}
|
2017-01-24 06:28:36 -06:00
|
|
|
}
|
2018-11-25 09:08:24 -06:00
|
|
|
(MiriCommand::Test, "lib") => {
|
2018-10-16 13:06:24 -05:00
|
|
|
// For libraries we call `cargo rustc -- --test <rustc args>`
|
|
|
|
// Notice now that `--test` is a rustc arg rather than a cargo arg. This tells
|
2018-11-27 08:06:23 -06:00
|
|
|
// rustc to build a test harness which calls all #[test] functions.
|
|
|
|
// We then execute that harness just like any other binary.
|
2018-10-15 13:38:07 -05:00
|
|
|
if let Err(code) = process(
|
|
|
|
vec!["--".to_string(), "--test".to_string()].into_iter().chain(
|
|
|
|
args,
|
|
|
|
),
|
|
|
|
)
|
|
|
|
{
|
|
|
|
std::process::exit(code);
|
|
|
|
}
|
2017-01-24 08:33:51 -06:00
|
|
|
}
|
2018-11-25 09:08:24 -06:00
|
|
|
(MiriCommand::Run, "bin") => {
|
2018-10-16 13:06:24 -05:00
|
|
|
// For ordinary binaries we call `cargo rustc --bin target -- <rustc args>`
|
2018-10-15 13:38:07 -05:00
|
|
|
if let Err(code) = process(
|
|
|
|
vec!["--bin".to_string(), target.name].into_iter().chain(
|
|
|
|
args,
|
|
|
|
),
|
|
|
|
)
|
|
|
|
{
|
|
|
|
std::process::exit(code);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
_ => {}
|
2017-01-24 06:28:36 -06:00
|
|
|
}
|
|
|
|
}
|
2018-12-12 10:03:40 -06:00
|
|
|
} else if let Some("rustc") = std::env::args().nth(1).as_ref().map(AsRef::as_ref) {
|
|
|
|
// This arm is executed when cargo-miri runs `cargo rustc` with the `RUSTC_WRAPPER` env var set to itself:
|
2018-11-19 15:59:41 -06:00
|
|
|
// Dependencies get dispatched to rustc, the final test/binary to miri.
|
2017-01-24 06:28:36 -06:00
|
|
|
|
|
|
|
let home = option_env!("RUSTUP_HOME").or(option_env!("MULTIRUST_HOME"));
|
|
|
|
let toolchain = option_env!("RUSTUP_TOOLCHAIN").or(option_env!("MULTIRUST_TOOLCHAIN"));
|
2018-04-07 07:31:39 -05:00
|
|
|
let sys_root = if let Ok(sysroot) = ::std::env::var("MIRI_SYSROOT") {
|
|
|
|
sysroot
|
|
|
|
} else if let (Some(home), Some(toolchain)) = (home, toolchain) {
|
2017-01-24 06:28:36 -06:00
|
|
|
format!("{}/toolchains/{}", home, toolchain)
|
|
|
|
} else {
|
2017-05-30 16:05:41 -05:00
|
|
|
option_env!("RUST_SYSROOT")
|
2017-01-24 06:28:36 -06:00
|
|
|
.map(|s| s.to_owned())
|
|
|
|
.or_else(|| {
|
|
|
|
Command::new("rustc")
|
|
|
|
.arg("--print")
|
|
|
|
.arg("sysroot")
|
|
|
|
.output()
|
|
|
|
.ok()
|
|
|
|
.and_then(|out| String::from_utf8(out.stdout).ok())
|
|
|
|
.map(|s| s.trim().to_owned())
|
|
|
|
})
|
2017-05-30 16:05:41 -05:00
|
|
|
.expect("need to specify RUST_SYSROOT env var during miri compilation, or use rustup or multirust")
|
2017-01-24 06:28:36 -06:00
|
|
|
};
|
|
|
|
|
2017-06-29 12:06:36 -05:00
|
|
|
// this conditional check for the --sysroot flag is there so users can call `cargo-miri` directly
|
2017-01-24 06:28:36 -06:00
|
|
|
// without having to pass --sysroot or anything
|
2018-12-12 10:03:40 -06:00
|
|
|
let rustc_args = std::env::args().skip(2);
|
2017-01-24 06:28:36 -06:00
|
|
|
let mut args: Vec<String> = if std::env::args().any(|s| s == "--sysroot") {
|
2018-12-12 10:03:40 -06:00
|
|
|
rustc_args.collect()
|
2017-01-24 06:28:36 -06:00
|
|
|
} else {
|
2018-12-12 10:03:40 -06:00
|
|
|
rustc_args
|
2017-08-10 10:48:38 -05:00
|
|
|
.chain(Some("--sysroot".to_owned()))
|
|
|
|
.chain(Some(sys_root))
|
|
|
|
.collect()
|
2017-01-24 06:28:36 -06:00
|
|
|
};
|
2018-11-03 05:03:53 -05:00
|
|
|
args.splice(0..0, miri::miri_default_args().iter().map(ToString::to_string));
|
2018-12-10 03:19:44 -06:00
|
|
|
args.extend_from_slice(&["--cfg".to_owned(), r#"feature="cargo-miri""#.to_owned()]);
|
2017-01-24 06:28:36 -06:00
|
|
|
|
|
|
|
// this check ensures that dependencies are built but not interpreted and the final crate is
|
|
|
|
// interpreted but not built
|
2018-06-03 05:13:30 -05:00
|
|
|
let miri_enabled = std::env::args().any(|s| s == "--emit=dep-info,metadata");
|
2017-06-29 12:06:36 -05:00
|
|
|
let mut command = if miri_enabled {
|
|
|
|
let mut path = std::env::current_exe().expect("current executable path invalid");
|
|
|
|
path.set_file_name("miri");
|
|
|
|
Command::new(path)
|
|
|
|
} else {
|
|
|
|
Command::new("rustc")
|
|
|
|
};
|
2018-12-10 03:19:44 -06:00
|
|
|
command.args(&args);
|
2017-01-24 06:28:36 -06:00
|
|
|
|
2018-12-10 03:19:44 -06:00
|
|
|
match command.status() {
|
2017-08-10 10:48:38 -05:00
|
|
|
Ok(exit) => {
|
|
|
|
if !exit.success() {
|
|
|
|
std::process::exit(exit.code().unwrap_or(42));
|
|
|
|
}
|
|
|
|
}
|
2017-06-29 12:06:36 -05:00
|
|
|
Err(ref e) if miri_enabled => panic!("error during miri run: {:?}", e),
|
|
|
|
Err(ref e) => panic!("error during rustc call: {:?}", e),
|
2017-01-24 06:28:36 -06:00
|
|
|
}
|
2018-12-12 10:03:40 -06:00
|
|
|
} else {
|
2018-12-12 10:30:20 -06:00
|
|
|
show_error(format!("Must be called with either `miri` or `rustc` as first argument."))
|
2017-01-24 06:28:36 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-06-29 12:06:36 -05:00
|
|
|
fn process<I>(old_args: I) -> Result<(), i32>
|
2017-08-10 10:48:38 -05:00
|
|
|
where
|
|
|
|
I: Iterator<Item = String>,
|
2017-01-24 06:28:36 -06:00
|
|
|
{
|
|
|
|
let mut args = vec!["rustc".to_owned()];
|
|
|
|
|
|
|
|
let mut found_dashes = false;
|
|
|
|
for arg in old_args {
|
|
|
|
found_dashes |= arg == "--";
|
|
|
|
args.push(arg);
|
|
|
|
}
|
|
|
|
if !found_dashes {
|
|
|
|
args.push("--".to_owned());
|
|
|
|
}
|
2018-06-03 05:13:30 -05:00
|
|
|
args.push("--emit=dep-info,metadata".to_owned());
|
2017-01-24 06:28:36 -06:00
|
|
|
|
|
|
|
let path = std::env::current_exe().expect("current executable path invalid");
|
2018-12-10 03:19:44 -06:00
|
|
|
let exit_status = Command::new("cargo")
|
2017-01-24 06:28:36 -06:00
|
|
|
.args(&args)
|
2018-12-12 10:03:40 -06:00
|
|
|
.env("RUSTC_WRAPPER", path)
|
2017-01-24 06:28:36 -06:00
|
|
|
.spawn()
|
|
|
|
.expect("could not run cargo")
|
|
|
|
.wait()
|
|
|
|
.expect("failed to wait for cargo?");
|
|
|
|
|
|
|
|
if exit_status.success() {
|
|
|
|
Ok(())
|
|
|
|
} else {
|
|
|
|
Err(exit_status.code().unwrap_or(-1))
|
|
|
|
}
|
|
|
|
}
|