e9b8693aaa
Previously miri used `cargo install xargo -f` which shouldn't be necessary anymore since `cargo install` will now upgrade without `-f`. The only reason I can see to use `-f` is from the cargo docs: > This is also useful if something has changed on the system that you > want to rebuild with, such as a newer version of `rustc`. See the [discussion on Zulip](https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/why.20does.20miri.20require.20xargo/near/214351239).
774 lines
30 KiB
Rust
774 lines
30 KiB
Rust
use std::env;
|
|
use std::ffi::OsString;
|
|
use std::fs::{self, File};
|
|
use std::io::{self, BufRead, BufReader, BufWriter, Write};
|
|
use std::ops::Not;
|
|
use std::path::{Path, PathBuf};
|
|
use std::process::Command;
|
|
|
|
use serde::{Deserialize, Serialize};
|
|
|
|
use rustc_version::VersionMeta;
|
|
|
|
const XARGO_MIN_VERSION: (u32, u32, u32) = (0, 3, 22);
|
|
|
|
const CARGO_MIRI_HELP: &str = r#"Runs binary crates and tests in Miri
|
|
|
|
Usage:
|
|
cargo miri [subcommand] [<cargo options>...] [--] [<program/test suite options>...]
|
|
|
|
Subcommands:
|
|
run Run binaries
|
|
test Run tests
|
|
setup Only perform automatic setup, but without asking questions (for getting a proper libstd)
|
|
|
|
The cargo options are exactly the same as for `cargo run` and `cargo test`, respectively.
|
|
|
|
Examples:
|
|
cargo miri run
|
|
cargo miri test -- test-suite-filter
|
|
"#;
|
|
|
|
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
|
|
enum MiriCommand {
|
|
Run,
|
|
Test,
|
|
Setup,
|
|
}
|
|
|
|
/// The inforamtion Miri needs to run a crate. Stored as JSON when the crate is "compiled".
|
|
#[derive(Serialize, Deserialize)]
|
|
struct CrateRunInfo {
|
|
/// The command-line arguments.
|
|
args: Vec<String>,
|
|
/// The environment.
|
|
env: Vec<(OsString, OsString)>,
|
|
/// The current working directory.
|
|
current_dir: OsString,
|
|
}
|
|
|
|
impl CrateRunInfo {
|
|
/// Gather all the information we need.
|
|
fn collect(args: env::Args) -> Self {
|
|
let args = args.collect();
|
|
let env = env::vars_os().collect();
|
|
let current_dir = env::current_dir().unwrap().into_os_string();
|
|
CrateRunInfo { args, env, current_dir }
|
|
}
|
|
|
|
fn store(&self, filename: &Path) {
|
|
let file = File::create(filename)
|
|
.unwrap_or_else(|_| show_error(format!("cannot create `{}`", filename.display())));
|
|
let file = BufWriter::new(file);
|
|
serde_json::ser::to_writer(file, self)
|
|
.unwrap_or_else(|_| show_error(format!("cannot write to `{}`", filename.display())));
|
|
}
|
|
}
|
|
|
|
fn show_help() {
|
|
println!("{}", CARGO_MIRI_HELP);
|
|
}
|
|
|
|
fn show_version() {
|
|
println!(
|
|
"miri {} ({} {})",
|
|
env!("CARGO_PKG_VERSION"),
|
|
env!("VERGEN_SHA_SHORT"),
|
|
env!("VERGEN_COMMIT_DATE")
|
|
);
|
|
}
|
|
|
|
fn show_error(msg: String) -> ! {
|
|
eprintln!("fatal error: {}", msg);
|
|
std::process::exit(1)
|
|
}
|
|
|
|
// Determines whether a `--flag` is present.
|
|
fn has_arg_flag(name: &str) -> bool {
|
|
let mut args = std::env::args().take_while(|val| val != "--");
|
|
args.any(|val| val == name)
|
|
}
|
|
|
|
/// Gets the value of a `--flag`.
|
|
fn get_arg_flag_value(name: &str) -> Option<String> {
|
|
// Stop searching at `--`.
|
|
let mut args = std::env::args().take_while(|val| val != "--");
|
|
loop {
|
|
let arg = match args.next() {
|
|
Some(arg) => arg,
|
|
None => return None,
|
|
};
|
|
if !arg.starts_with(name) {
|
|
continue;
|
|
}
|
|
// Strip leading `name`.
|
|
let suffix = &arg[name.len()..];
|
|
if suffix.is_empty() {
|
|
// This argument is exactly `name`; the next one is the value.
|
|
return args.next();
|
|
} else if suffix.starts_with('=') {
|
|
// This argument is `name=value`; get the value.
|
|
// Strip leading `=`.
|
|
return Some(suffix[1..].to_owned());
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Returns the path to the `miri` binary
|
|
fn find_miri() -> PathBuf {
|
|
if let Some(path) = env::var_os("MIRI") {
|
|
return path.into();
|
|
}
|
|
let mut path = std::env::current_exe().expect("current executable path invalid");
|
|
path.set_file_name("miri");
|
|
path
|
|
}
|
|
|
|
fn miri() -> Command {
|
|
Command::new(find_miri())
|
|
}
|
|
|
|
fn version_info() -> VersionMeta {
|
|
VersionMeta::for_command(miri()).expect("failed to determine underlying rustc version of Miri")
|
|
}
|
|
|
|
fn cargo() -> Command {
|
|
Command::new(env::var_os("CARGO").unwrap_or_else(|| OsString::from("cargo")))
|
|
}
|
|
|
|
fn xargo_check() -> Command {
|
|
Command::new(env::var_os("XARGO_CHECK").unwrap_or_else(|| OsString::from("xargo-check")))
|
|
}
|
|
|
|
/// Execute the command. If it fails, fail this process with the same exit code.
|
|
/// Otherwise, continue.
|
|
fn exec(mut cmd: Command) {
|
|
let exit_status = cmd.status().expect("failed to run command");
|
|
if exit_status.success().not() {
|
|
std::process::exit(exit_status.code().unwrap_or(-1))
|
|
}
|
|
}
|
|
|
|
fn xargo_version() -> Option<(u32, u32, u32)> {
|
|
let out = xargo_check().arg("--version").output().ok()?;
|
|
if !out.status.success() {
|
|
return None;
|
|
}
|
|
// Parse output. The first line looks like "xargo 0.3.12 (b004f1c 2018-12-13)".
|
|
let line = out
|
|
.stderr
|
|
.lines()
|
|
.nth(0)
|
|
.expect("malformed `xargo --version` output: not at least one line")
|
|
.expect("malformed `xargo --version` output: error reading first line");
|
|
let (name, version) = {
|
|
let mut split = line.split(' ');
|
|
(
|
|
split.next().expect("malformed `xargo --version` output: empty"),
|
|
split.next().expect("malformed `xargo --version` output: not at least two words"),
|
|
)
|
|
};
|
|
if name != "xargo" {
|
|
// This is some fork of xargo
|
|
return None;
|
|
}
|
|
let mut version_pieces = version.split('.');
|
|
let major = version_pieces
|
|
.next()
|
|
.expect("malformed `xargo --version` output: not a major version piece")
|
|
.parse()
|
|
.expect("malformed `xargo --version` output: major version is not an integer");
|
|
let minor = version_pieces
|
|
.next()
|
|
.expect("malformed `xargo --version` output: not a minor version piece")
|
|
.parse()
|
|
.expect("malformed `xargo --version` output: minor version is not an integer");
|
|
let patch = version_pieces
|
|
.next()
|
|
.expect("malformed `xargo --version` output: not a patch version piece")
|
|
.parse()
|
|
.expect("malformed `xargo --version` output: patch version is not an integer");
|
|
if !version_pieces.next().is_none() {
|
|
panic!("malformed `xargo --version` output: more than three pieces in version");
|
|
}
|
|
Some((major, minor, patch))
|
|
}
|
|
|
|
fn ask_to_run(mut cmd: Command, ask: bool, text: &str) {
|
|
// Disable interactive prompts in CI (GitHub Actions, Travis, AppVeyor, etc).
|
|
// Azure doesn't set `CI` though (nothing to see here, just Microsoft being Microsoft),
|
|
// so we also check their `TF_BUILD`.
|
|
let is_ci = env::var_os("CI").is_some() || env::var_os("TF_BUILD").is_some();
|
|
if ask && !is_ci {
|
|
let mut buf = String::new();
|
|
print!("I will run `{:?}` to {}. Proceed? [Y/n] ", cmd, text);
|
|
io::stdout().flush().unwrap();
|
|
io::stdin().read_line(&mut buf).unwrap();
|
|
match buf.trim().to_lowercase().as_ref() {
|
|
// Proceed.
|
|
"" | "y" | "yes" => {}
|
|
"n" | "no" => show_error(format!("aborting as per your request")),
|
|
a => show_error(format!("invalid answer `{}`", a)),
|
|
};
|
|
} else {
|
|
println!("Running `{:?}` to {}.", cmd, text);
|
|
}
|
|
|
|
if cmd.status().expect(&format!("failed to execute {:?}", cmd)).success().not() {
|
|
show_error(format!("failed to {}", text));
|
|
}
|
|
}
|
|
|
|
/// Performs the setup required to make `cargo miri` work: Getting a custom-built libstd. Then sets
|
|
/// `MIRI_SYSROOT`. Skipped if `MIRI_SYSROOT` is already set, in which case we expect the user has
|
|
/// done all this already.
|
|
fn setup(subcommand: MiriCommand) {
|
|
if std::env::var_os("MIRI_SYSROOT").is_some() {
|
|
if subcommand == MiriCommand::Setup {
|
|
println!("WARNING: MIRI_SYSROOT already set, not doing anything.")
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Subcommands other than `setup` will do a setup if necessary, but
|
|
// interactively confirm first.
|
|
let ask_user = subcommand != MiriCommand::Setup;
|
|
|
|
// First, we need xargo.
|
|
if xargo_version().map_or(true, |v| v < XARGO_MIN_VERSION) {
|
|
if std::env::var_os("XARGO_CHECK").is_some() {
|
|
// The user manually gave us a xargo binary; don't do anything automatically.
|
|
show_error(format!("xargo is too old; please upgrade to the latest version"))
|
|
}
|
|
let mut cmd = cargo();
|
|
cmd.args(&["install", "xargo"]);
|
|
ask_to_run(cmd, ask_user, "install a recent enough xargo");
|
|
}
|
|
|
|
// Determine where the rust sources are located. `XARGO_RUST_SRC` env var trumps everything.
|
|
let rust_src = match std::env::var_os("XARGO_RUST_SRC") {
|
|
Some(path) => {
|
|
let path = PathBuf::from(path);
|
|
// Make path absolute if possible.
|
|
path.canonicalize().unwrap_or(path)
|
|
}
|
|
None => {
|
|
// Check for `rust-src` rustup component.
|
|
let sysroot = miri()
|
|
.args(&["--print", "sysroot"])
|
|
.output()
|
|
.expect("failed to determine sysroot")
|
|
.stdout;
|
|
let sysroot = std::str::from_utf8(&sysroot).unwrap();
|
|
let sysroot = Path::new(sysroot.trim_end_matches('\n'));
|
|
// Check for `$SYSROOT/lib/rustlib/src/rust/library`; test if that contains `std/Cargo.toml`.
|
|
let rustup_src =
|
|
sysroot.join("lib").join("rustlib").join("src").join("rust").join("library");
|
|
if !rustup_src.join("std").join("Cargo.toml").exists() {
|
|
// Ask the user to install the `rust-src` component, and use that.
|
|
let mut cmd = Command::new("rustup");
|
|
cmd.args(&["component", "add", "rust-src"]);
|
|
ask_to_run(
|
|
cmd,
|
|
ask_user,
|
|
"install the `rust-src` component for the selected toolchain",
|
|
);
|
|
}
|
|
rustup_src
|
|
}
|
|
};
|
|
if !rust_src.exists() {
|
|
show_error(format!("given Rust source directory `{}` does not exist.", rust_src.display()));
|
|
}
|
|
|
|
// Next, we need our own libstd. Prepare a xargo project for that purpose.
|
|
// We will do this work in whatever is a good cache dir for this platform.
|
|
let dirs = directories::ProjectDirs::from("org", "rust-lang", "miri").unwrap();
|
|
let dir = dirs.cache_dir();
|
|
if !dir.exists() {
|
|
fs::create_dir_all(&dir).unwrap();
|
|
}
|
|
// The interesting bit: Xargo.toml
|
|
File::create(dir.join("Xargo.toml"))
|
|
.unwrap()
|
|
.write_all(
|
|
br#"
|
|
[dependencies.std]
|
|
default_features = false
|
|
# We support unwinding, so enable that panic runtime.
|
|
features = ["panic_unwind", "backtrace"]
|
|
|
|
[dependencies.test]
|
|
"#,
|
|
)
|
|
.unwrap();
|
|
// The boring bits: a dummy project for xargo.
|
|
// FIXME: With xargo-check, can we avoid doing this?
|
|
File::create(dir.join("Cargo.toml"))
|
|
.unwrap()
|
|
.write_all(
|
|
br#"
|
|
[package]
|
|
name = "miri-xargo"
|
|
description = "A dummy project for building libstd with xargo."
|
|
version = "0.0.0"
|
|
|
|
[lib]
|
|
path = "lib.rs"
|
|
"#,
|
|
)
|
|
.unwrap();
|
|
File::create(dir.join("lib.rs")).unwrap();
|
|
|
|
// Determine architectures.
|
|
// We always need to set a target so rustc bootstrap can tell apart host from target crates.
|
|
let host = version_info().host;
|
|
let target = get_arg_flag_value("--target");
|
|
let target = target.as_ref().unwrap_or(&host);
|
|
// Now invoke xargo.
|
|
let mut command = xargo_check();
|
|
command.arg("check").arg("-q");
|
|
command.arg("--target").arg(target);
|
|
command.current_dir(&dir);
|
|
command.env("XARGO_HOME", &dir);
|
|
command.env("XARGO_RUST_SRC", &rust_src);
|
|
// Use Miri as rustc to build a libstd compatible with us (and use the right flags).
|
|
// However, when we are running in bootstrap, we cannot just overwrite `RUSTC`,
|
|
// because we still need bootstrap to distinguish between host and target crates.
|
|
// In that case we overwrite `RUSTC_REAL` instead which determines the rustc used
|
|
// for target crates.
|
|
// We set ourselves (`cargo-miri`) instead of Miri directly to be able to patch the flags
|
|
// for `libpanic_abort` (usually this is done by bootstrap but we have to do it ourselves).
|
|
// The `MIRI_BE_RUSTC` will mean we dispatch to `phase_setup_rustc`.
|
|
let cargo_miri_path = std::env::current_exe().expect("current executable path invalid");
|
|
if env::var_os("RUSTC_STAGE").is_some() {
|
|
command.env("RUSTC_REAL", &cargo_miri_path);
|
|
} else {
|
|
command.env("RUSTC", &cargo_miri_path);
|
|
}
|
|
command.env("MIRI_BE_RUSTC", "1");
|
|
// Make sure there are no other wrappers or flags getting in our way
|
|
// (Cc https://github.com/rust-lang/miri/issues/1421).
|
|
// This is consistent with normal `cargo build` that does not apply `RUSTFLAGS`
|
|
// to the sysroot either.
|
|
command.env_remove("RUSTC_WRAPPER");
|
|
command.env_remove("RUSTFLAGS");
|
|
// Finally run it!
|
|
if command.status().expect("failed to run xargo").success().not() {
|
|
show_error(format!("failed to run xargo"));
|
|
}
|
|
|
|
// That should be it! But we need to figure out where xargo built stuff.
|
|
// Unfortunately, it puts things into a different directory when the
|
|
// architecture matches the host.
|
|
let sysroot = if target == &host { dir.join("HOST") } else { PathBuf::from(dir) };
|
|
std::env::set_var("MIRI_SYSROOT", &sysroot); // pass the env var to the processes we spawn, which will turn it into "--sysroot" flags
|
|
// Figure out what to print.
|
|
let print_sysroot = subcommand == MiriCommand::Setup && has_arg_flag("--print-sysroot"); // whether we just print the sysroot path
|
|
if print_sysroot {
|
|
// Print just the sysroot and nothing else; this way we do not need any escaping.
|
|
println!("{}", sysroot.display());
|
|
} else if subcommand == MiriCommand::Setup {
|
|
println!("A libstd for Miri is now available in `{}`.", sysroot.display());
|
|
}
|
|
}
|
|
|
|
fn phase_setup_rustc(args: env::Args) {
|
|
// Mostly we just forward everything.
|
|
// `MIRI_BE_RUST` is already set.
|
|
let mut cmd = miri();
|
|
cmd.args(args);
|
|
|
|
// Patch the panic runtime for `libpanic_abort` (mirroring what bootstrap usually does).
|
|
if get_arg_flag_value("--crate-name").as_deref() == Some("panic_abort") {
|
|
cmd.arg("-C").arg("panic=abort");
|
|
}
|
|
|
|
// Run it!
|
|
exec(cmd);
|
|
}
|
|
|
|
fn phase_cargo_miri(mut args: env::Args) {
|
|
// Check for version and help flags even when invoked as `cargo-miri`.
|
|
if has_arg_flag("--help") || has_arg_flag("-h") {
|
|
show_help();
|
|
return;
|
|
}
|
|
if has_arg_flag("--version") || has_arg_flag("-V") {
|
|
show_version();
|
|
return;
|
|
}
|
|
|
|
// Require a subcommand before any flags.
|
|
// We cannot know which of those flags take arguments and which do not,
|
|
// so we cannot detect subcommands later.
|
|
let subcommand = match args.next().as_deref() {
|
|
Some("test") => MiriCommand::Test,
|
|
Some("run") => MiriCommand::Run,
|
|
Some("setup") => MiriCommand::Setup,
|
|
// Invalid command.
|
|
_ => show_error(format!("`cargo miri` supports the following subcommands: `run`, `test`, and `setup`.")),
|
|
};
|
|
let verbose = has_arg_flag("-v");
|
|
|
|
// We always setup.
|
|
setup(subcommand);
|
|
|
|
// Invoke actual cargo for the job, but with different flags.
|
|
// We re-use `cargo test` and `cargo run`, which makes target and binary handling very easy but
|
|
// requires some extra work to make the build check-only (see all the `--emit` hacks below).
|
|
// <https://github.com/rust-lang/miri/pull/1540#issuecomment-693553191> describes an alternative
|
|
// approach that uses `cargo check`, making that part easier but target and binary handling
|
|
// harder.
|
|
let cargo_miri_path = std::env::current_exe().expect("current executable path invalid");
|
|
let cargo_cmd = match subcommand {
|
|
MiriCommand::Test => "test",
|
|
MiriCommand::Run => "run",
|
|
MiriCommand::Setup => return, // `cargo miri setup` stops here.
|
|
};
|
|
let mut cmd = cargo();
|
|
cmd.arg(cargo_cmd);
|
|
|
|
// Make sure we know the build target, and cargo does, too.
|
|
// This is needed to make the `CARGO_TARGET_*_RUNNER` env var do something,
|
|
// and it later helps us detect which crates are proc-macro/build-script
|
|
// (host crates) and which crates are needed for the program itself.
|
|
let target = if let Some(target) = get_arg_flag_value("--target") {
|
|
target
|
|
} else {
|
|
// No target given. Pick default and tell cargo about it.
|
|
let host = version_info().host;
|
|
cmd.arg("--target");
|
|
cmd.arg(&host);
|
|
host
|
|
};
|
|
|
|
// Forward all further arguments. We do some processing here because we want to
|
|
// detect people still using the old way of passing flags to Miri
|
|
// (`cargo miri -- -Zmiri-foo`).
|
|
while let Some(arg) = args.next() {
|
|
cmd.arg(&arg);
|
|
if arg == "--" {
|
|
// Check if the next argument starts with `-Zmiri`. If yes, we assume
|
|
// this is an old-style invocation.
|
|
if let Some(next_arg) = args.next() {
|
|
if next_arg.starts_with("-Zmiri") || next_arg == "--" {
|
|
eprintln!(
|
|
"WARNING: it seems like you are setting Miri's flags in `cargo miri` the old way,\n\
|
|
i.e., by passing them after the first `--`. This style is deprecated; please set\n\
|
|
the MIRIFLAGS environment variable instead. `cargo miri run/test` now interprets\n\
|
|
arguments the exact same way as `cargo run/test`."
|
|
);
|
|
// Old-style invocation. Turn these into MIRIFLAGS, if there are any.
|
|
if next_arg != "--" {
|
|
let mut miriflags = env::var("MIRIFLAGS").unwrap_or_default();
|
|
miriflags.push(' ');
|
|
miriflags.push_str(&next_arg);
|
|
while let Some(further_arg) = args.next() {
|
|
if further_arg == "--" {
|
|
// End of the Miri flags!
|
|
break;
|
|
}
|
|
miriflags.push(' ');
|
|
miriflags.push_str(&further_arg);
|
|
}
|
|
env::set_var("MIRIFLAGS", miriflags);
|
|
}
|
|
// Pass the remaining flags to cargo.
|
|
cmd.args(args);
|
|
break;
|
|
}
|
|
// Not a Miri argument after all, make sure we pass it to cargo.
|
|
cmd.arg(next_arg);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Set `RUSTC_WRAPPER` to ourselves. Cargo will prepend that binary to its usual invocation,
|
|
// i.e., the first argument is `rustc` -- which is what we use in `main` to distinguish
|
|
// the two codepaths. (That extra argument is why we prefer this over setting `RUSTC`.)
|
|
if env::var_os("RUSTC_WRAPPER").is_some() {
|
|
println!("WARNING: Ignoring `RUSTC_WRAPPER` environment variable, Miri does not support wrapping.");
|
|
}
|
|
cmd.env("RUSTC_WRAPPER", &cargo_miri_path);
|
|
|
|
// Set the runner for the current target to us as well, so we can interpret the binaries.
|
|
let runner_env_name = format!("CARGO_TARGET_{}_RUNNER", target.to_uppercase().replace('-', "_"));
|
|
cmd.env(&runner_env_name, &cargo_miri_path);
|
|
|
|
// Set rustdoc to us as well, so we can make it do nothing (see issue #584).
|
|
cmd.env("RUSTDOC", &cargo_miri_path);
|
|
|
|
// Run cargo.
|
|
if verbose {
|
|
eprintln!("[cargo-miri miri] RUSTC_WRAPPER={:?}", cargo_miri_path);
|
|
eprintln!("[cargo-miri miri] {}={:?}", runner_env_name, cargo_miri_path);
|
|
eprintln!("[cargo-miri miri] RUSTDOC={:?}", cargo_miri_path);
|
|
eprintln!("[cargo-miri miri] {:?}", cmd);
|
|
cmd.env("MIRI_VERBOSE", ""); // This makes the other phases verbose.
|
|
}
|
|
exec(cmd)
|
|
}
|
|
|
|
fn phase_cargo_rustc(args: env::Args) {
|
|
/// Determines if we are being invoked (as rustc) to build a crate for
|
|
/// the "target" architecture, in contrast to the "host" architecture.
|
|
/// Host crates are for build scripts and proc macros and still need to
|
|
/// be built like normal; target crates need to be built for or interpreted
|
|
/// by Miri.
|
|
///
|
|
/// Currently, we detect this by checking for "--target=", which is
|
|
/// never set for host crates. This matches what rustc bootstrap does,
|
|
/// which hopefully makes it "reliable enough". This relies on us always
|
|
/// invoking cargo itself with `--target`, which `in_cargo_miri` ensures.
|
|
fn is_target_crate() -> bool {
|
|
get_arg_flag_value("--target").is_some()
|
|
}
|
|
|
|
/// Returns whether or not Cargo invoked the wrapper (this binary) to compile
|
|
/// the final, binary crate (either a test for 'cargo test', or a binary for 'cargo run')
|
|
/// Cargo does not give us this information directly, so we need to check
|
|
/// various command-line flags.
|
|
fn is_runnable_crate() -> bool {
|
|
let is_bin = get_arg_flag_value("--crate-type").as_deref().unwrap_or("bin") == "bin";
|
|
let is_test = has_arg_flag("--test");
|
|
is_bin || is_test
|
|
}
|
|
|
|
fn out_filename(prefix: &str, suffix: &str) -> PathBuf {
|
|
let mut path = PathBuf::from(get_arg_flag_value("--out-dir").unwrap());
|
|
path.push(format!(
|
|
"{}{}{}{}",
|
|
prefix,
|
|
get_arg_flag_value("--crate-name").unwrap(),
|
|
// This is technically a `-C` flag but the prefix seems unique enough...
|
|
// (and cargo passes this before the filename so it should be unique)
|
|
get_arg_flag_value("extra-filename").unwrap_or(String::new()),
|
|
suffix,
|
|
));
|
|
path
|
|
}
|
|
|
|
let verbose = std::env::var_os("MIRI_VERBOSE").is_some();
|
|
let target_crate = is_target_crate();
|
|
let print = get_arg_flag_value("--print").is_some(); // whether this is cargo passing `--print` to get some infos
|
|
|
|
// rlib and cdylib are just skipped, we cannot interpret them and do not need them
|
|
// for the rest of the build either.
|
|
match get_arg_flag_value("--crate-type").as_deref() {
|
|
Some("rlib") | Some("cdylib") => {
|
|
if verbose {
|
|
eprint!("[cargo-miri rustc] (rlib/cdylib skipped)");
|
|
}
|
|
return;
|
|
}
|
|
_ => {},
|
|
}
|
|
|
|
if !print && target_crate && is_runnable_crate() {
|
|
// This is the binary or test crate that we want to interpret under Miri.
|
|
// But we cannot run it here, as cargo invoked us as a compiler -- our stdin and stdout are not
|
|
// like we want them.
|
|
// Instead of compiling, we write JSON into the output file with all the relevant command-line flags
|
|
// and environment variables; this is used when cargo calls us again in the CARGO_TARGET_RUNNER phase.
|
|
let info = CrateRunInfo::collect(args);
|
|
let filename = out_filename("", "");
|
|
if verbose {
|
|
eprintln!("[cargo-miri rustc] writing run info to `{}`", filename.display());
|
|
}
|
|
|
|
info.store(&filename);
|
|
// For Windows, do the same thing again with `.exe` appended to the filename.
|
|
// (Need to do this here as cargo moves that "binary" to a different place before running it.)
|
|
info.store(&out_filename("", ".exe"));
|
|
|
|
return;
|
|
}
|
|
|
|
let mut cmd = miri();
|
|
let mut emit_link_hack = false;
|
|
// Arguments are treated very differently depending on whether this crate is
|
|
// for interpretation by Miri, or for use by a build script / proc macro.
|
|
if !print && target_crate {
|
|
// Forward arguments, but remove "link" from "--emit" to make this a check-only build.
|
|
let emit_flag = "--emit";
|
|
for arg in args {
|
|
if arg.starts_with(emit_flag) {
|
|
// Patch this argument. First, extract its value.
|
|
let val = &arg[emit_flag.len()..];
|
|
assert!(val.starts_with("="), "`cargo` should pass `--emit=X` as one argument");
|
|
let val = &val[1..];
|
|
let mut val: Vec<_> = val.split(',').collect();
|
|
// Now make sure "link" is not in there, but "metadata" is.
|
|
if let Some(i) = val.iter().position(|&s| s == "link") {
|
|
emit_link_hack = true;
|
|
val.remove(i);
|
|
if !val.iter().any(|&s| s == "metadata") {
|
|
val.push("metadata");
|
|
}
|
|
}
|
|
cmd.arg(format!("{}={}", emit_flag, val.join(",")));
|
|
} else {
|
|
cmd.arg(arg);
|
|
}
|
|
}
|
|
|
|
// Use our custom sysroot.
|
|
let sysroot =
|
|
env::var_os("MIRI_SYSROOT").expect("the wrapper should have set MIRI_SYSROOT");
|
|
cmd.arg("--sysroot");
|
|
cmd.arg(sysroot);
|
|
} else {
|
|
// For host crates or when we are printing, just forward everything.
|
|
cmd.args(args);
|
|
}
|
|
|
|
// We want to compile, not interpret. We still use Miri to make sure the compiler version etc
|
|
// are the exact same as what is used for interpretation.
|
|
cmd.env("MIRI_BE_RUSTC", "1");
|
|
|
|
// Run it.
|
|
if verbose {
|
|
eprintln!("[cargo-miri rustc] {:?}", cmd);
|
|
}
|
|
exec(cmd);
|
|
|
|
// Create a stub .rlib file if "link" was requested by cargo.
|
|
if emit_link_hack {
|
|
// Some platforms prepend "lib", some do not... let's just create both files.
|
|
let filename = out_filename("lib", ".rlib");
|
|
File::create(filename).expect("failed to create rlib file");
|
|
let filename = out_filename("", ".rlib");
|
|
File::create(filename).expect("failed to create rlib file");
|
|
}
|
|
}
|
|
|
|
fn phase_cargo_runner(binary: &Path, binary_args: env::Args) {
|
|
let verbose = std::env::var_os("MIRI_VERBOSE").is_some();
|
|
|
|
let file = File::open(&binary)
|
|
.unwrap_or_else(|_| show_error(format!("file {:?} not found or `cargo-miri` invoked incorrectly; please only invoke this binary through `cargo miri`", binary)));
|
|
let file = BufReader::new(file);
|
|
let info: CrateRunInfo = serde_json::from_reader(file)
|
|
.unwrap_or_else(|_| show_error(format!("file {:?} contains outdated or invalid JSON; try `cargo clean`", binary)));
|
|
|
|
// Set missing env vars. Looks like `build.rs` vars are still set at run-time, but
|
|
// `CARGO_BIN_EXE_*` are not. This means we can give the run-time environment precedence,
|
|
// to rather do too little than too much.
|
|
for (name, val) in info.env {
|
|
if env::var_os(&name).is_none() {
|
|
env::set_var(name, val);
|
|
}
|
|
}
|
|
|
|
let mut cmd = miri();
|
|
// Forward rustc arguments.
|
|
// We need to patch "--extern" filenames because we forced a check-only
|
|
// build without cargo knowing about that: replace `.rlib` suffix by
|
|
// `.rmeta`.
|
|
// We also need to remove `--error-format` as cargo specifies that to be JSON,
|
|
// but when we run here, cargo does not interpret the JSON any more. `--json`
|
|
// then also nees to be dropped.
|
|
let mut args = info.args.into_iter();
|
|
let extern_flag = "--extern";
|
|
let error_format_flag = "--error-format";
|
|
let json_flag = "--json";
|
|
while let Some(arg) = args.next() {
|
|
if arg == extern_flag {
|
|
cmd.arg(extern_flag); // always forward flag, but adjust filename
|
|
// `--extern` is always passed as a separate argument by cargo.
|
|
let next_arg = args.next().expect("`--extern` should be followed by a filename");
|
|
if let Some(next_lib) = next_arg.strip_suffix(".rlib") {
|
|
// If this is an rlib, make it an rmeta.
|
|
cmd.arg(format!("{}.rmeta", next_lib));
|
|
} else {
|
|
// Some other extern file (e.g., a `.so`). Forward unchanged.
|
|
cmd.arg(next_arg);
|
|
}
|
|
} else if arg.starts_with(error_format_flag) {
|
|
let suffix = &arg[error_format_flag.len()..];
|
|
assert!(suffix.starts_with('='));
|
|
// Drop this argument.
|
|
} else if arg.starts_with(json_flag) {
|
|
let suffix = &arg[json_flag.len()..];
|
|
assert!(suffix.starts_with('='));
|
|
// Drop this argument.
|
|
} else {
|
|
cmd.arg(arg);
|
|
}
|
|
}
|
|
// Set sysroot.
|
|
let sysroot =
|
|
env::var_os("MIRI_SYSROOT").expect("the wrapper should have set MIRI_SYSROOT");
|
|
cmd.arg("--sysroot");
|
|
cmd.arg(sysroot);
|
|
// Respect `MIRIFLAGS`.
|
|
if let Ok(a) = env::var("MIRIFLAGS") {
|
|
// This code is taken from `RUSTFLAGS` handling in cargo.
|
|
let args = a
|
|
.split(' ')
|
|
.map(str::trim)
|
|
.filter(|s| !s.is_empty())
|
|
.map(str::to_string);
|
|
cmd.args(args);
|
|
}
|
|
|
|
// Then pass binary arguments.
|
|
cmd.arg("--");
|
|
cmd.args(binary_args);
|
|
|
|
// Make sure we use the build-time working directory for interpreting Miri/rustc arguments.
|
|
// But then we need to switch to the run-time one, which we instruct Miri do do by setting `MIRI_CWD`.
|
|
cmd.current_dir(info.current_dir);
|
|
cmd.env("MIRI_CWD", env::current_dir().unwrap());
|
|
|
|
// Run it.
|
|
if verbose {
|
|
eprintln!("[cargo-miri runner] {:?}", cmd);
|
|
}
|
|
exec(cmd)
|
|
}
|
|
|
|
fn main() {
|
|
// Rustc does not support non-UTF-8 arguments so we make no attempt either.
|
|
// (We do support non-UTF-8 environment variables though.)
|
|
let mut args = std::env::args();
|
|
// Skip binary name.
|
|
args.next().unwrap();
|
|
|
|
// Dispatch running as part of sysroot compilation.
|
|
if env::var_os("MIRI_BE_RUSTC").is_some() {
|
|
phase_setup_rustc(args);
|
|
return;
|
|
}
|
|
|
|
// Dispatch to `cargo-miri` phase. There are three phases:
|
|
// - When we are called via `cargo miri`, we run as the frontend and invoke the underlying
|
|
// cargo. We set RUSTC_WRAPPER and CARGO_TARGET_RUNNER to ourselves.
|
|
// - When we are executed due to RUSTC_WRAPPER, we build crates or store the flags of
|
|
// binary crates for later interpretation.
|
|
// - When we are executed due to CARGO_TARGET_RUNNER, we start interpretation based on the
|
|
// flags that were stored earlier.
|
|
// On top of that, we are also called as RUSTDOC, but that is just a stub currently.
|
|
match args.next().as_deref() {
|
|
Some("miri") => phase_cargo_miri(args),
|
|
Some("rustc") => phase_cargo_rustc(args),
|
|
Some(arg) => {
|
|
// We have to distinguish the "runner" and "rustfmt" cases.
|
|
// As runner, the first argument is the binary (a file that should exist, with an absolute path);
|
|
// as rustfmt, the first argument is a flag (`--something`).
|
|
let binary = Path::new(arg);
|
|
if binary.exists() {
|
|
assert!(!arg.starts_with("--")); // not a flag
|
|
phase_cargo_runner(binary, args);
|
|
} else if arg.starts_with("--") {
|
|
// We are rustdoc.
|
|
eprintln!("Running doctests is not currently supported by Miri.")
|
|
} else {
|
|
show_error(format!("`cargo-miri` called with unexpected first argument `{}`; please only invoke this binary through `cargo miri`", arg));
|
|
}
|
|
}
|
|
_ => show_error(format!("`cargo-miri` called without first argument; please only invoke this binary through `cargo miri`")),
|
|
}
|
|
}
|