#![feature(rustc_private)]
+extern crate env_logger;
extern crate getopts;
+#[macro_use]
+extern crate log;
+extern crate log_settings;
extern crate miri;
extern crate rustc;
-extern crate rustc_metadata;
extern crate rustc_driver;
-extern crate rustc_errors;
-extern crate rustc_codegen_utils;
-extern crate env_logger;
-extern crate log_settings;
-extern crate syntax;
+extern crate rustc_hir;
+extern crate rustc_interface;
+extern crate rustc_session;
-#[macro_use]
-extern crate log;
-
-use std::path::PathBuf;
-use std::str::FromStr;
+use std::convert::TryFrom;
use std::env;
+use std::str::FromStr;
-use rustc::session::Session;
-use rustc_metadata::cstore::CStore;
-use rustc_driver::{Compilation, CompilerCalls, RustcDefaultCalls};
-use rustc_driver::driver::{CompileState, CompileController};
-use rustc::session::config::{self, Input, ErrorOutputType};
-use rustc_codegen_utils::codegen_backend::CodegenBackend;
-use rustc::hir::def_id::LOCAL_CRATE;
-use syntax::ast;
+use hex::FromHexError;
-struct MiriCompilerCalls {
- default: Box<RustcDefaultCalls>,
+use rustc_session::CtfeBacktrace;
+use rustc_driver::Compilation;
+use rustc_hir::def_id::LOCAL_CRATE;
+use rustc_interface::{interface, Queries};
+use rustc::ty::TyCtxt;
- /// Whether to enforce the validity invariant.
- validate: bool,
+struct MiriCompilerCalls {
+ miri_config: miri::MiriConfig,
}
-impl<'a> CompilerCalls<'a> for MiriCompilerCalls {
- fn early_callback(
+impl rustc_driver::Callbacks for MiriCompilerCalls {
+ fn after_analysis<'tcx>(
&mut self,
- matches: &getopts::Matches,
- sopts: &config::Options,
- cfg: &ast::CrateConfig,
- descriptions: &rustc_errors::registry::Registry,
- output: ErrorOutputType,
+ compiler: &interface::Compiler,
+ queries: &'tcx Queries<'tcx>,
) -> Compilation {
- self.default.early_callback(
- matches,
- sopts,
- cfg,
- descriptions,
- output,
- )
- }
- fn no_input(
- &mut self,
- matches: &getopts::Matches,
- sopts: &config::Options,
- cfg: &ast::CrateConfig,
- odir: &Option<PathBuf>,
- ofile: &Option<PathBuf>,
- descriptions: &rustc_errors::registry::Registry,
- ) -> Option<(Input, Option<PathBuf>)> {
- self.default.no_input(
- matches,
- sopts,
- cfg,
- odir,
- ofile,
- descriptions,
- )
- }
- fn late_callback(
- &mut self,
- codegen_backend: &CodegenBackend,
- matches: &getopts::Matches,
- sess: &Session,
- cstore: &CStore,
- input: &Input,
- odir: &Option<PathBuf>,
- ofile: &Option<PathBuf>,
- ) -> Compilation {
- self.default.late_callback(codegen_backend, matches, sess, cstore, input, odir, ofile)
- }
- fn build_controller(
- self: Box<Self>,
- sess: &Session,
- matches: &getopts::Matches,
- ) -> CompileController<'a> {
- let this = *self;
- let mut control = this.default.build_controller(sess, matches);
- control.after_hir_lowering.callback = Box::new(after_hir_lowering);
- let validate = this.validate;
- control.after_analysis.callback =
- Box::new(move |state| after_analysis(state, validate));
- control.after_analysis.stop = Compilation::Stop;
- control
- }
-}
-
-fn after_hir_lowering(state: &mut CompileState) {
- let attr = (
- String::from("miri"),
- syntax::feature_gate::AttributeType::Whitelisted,
- );
- state.session.plugin_attributes.borrow_mut().push(attr);
-}
-
-fn after_analysis<'a, 'tcx>(
- state: &mut CompileState<'a, 'tcx>,
- validate: bool,
-) {
- init_late_loggers();
- state.session.abort_if_errors();
+ compiler.session().abort_if_errors();
- let tcx = state.tcx.unwrap();
+ queries.global_ctxt().unwrap().peek_mut().enter(|tcx| {
+ init_late_loggers(tcx);
+ let (entry_def_id, _) = tcx.entry_fn(LOCAL_CRATE).expect("no main function found!");
+ let mut config = self.miri_config.clone();
+ // Add filename to `miri` arguments.
+ config.args.insert(0, compiler.input().filestem().to_string());
- let (entry_def_id, _) = tcx.entry_fn(LOCAL_CRATE).expect("no main function found!");
+ if let Some(return_code) = miri::eval_main(tcx, entry_def_id, config) {
+ std::process::exit(
+ i32::try_from(return_code).expect("Return value was too large!"),
+ );
+ }
+ });
- miri::eval_main(tcx, entry_def_id, validate);
+ compiler.session().abort_if_errors();
- state.session.abort_if_errors();
+ Compilation::Stop
+ }
}
fn init_early_loggers() {
- // Notice that our `extern crate log` is NOT the same as rustc's! So we have to initialize
- // them both. We always initialize miri early.
+ // Note that our `extern crate log` is *not* the same as rustc's; as a result, we have to
+ // initialize them both, and we always initialize `miri`'s first.
let env = env_logger::Env::new().filter("MIRI_LOG").write_style("MIRI_LOG_STYLE");
env_logger::init_from_env(env);
- // We only initialize rustc if the env var is set (so the user asked for it).
+ // We only initialize `rustc` if the env var is set (so the user asked for it).
// If it is not set, we avoid initializing now so that we can initialize
- // later with our custom settings, and NOT log anything for what happens before
- // miri gets started.
- if env::var("RUST_LOG").is_ok() {
+ // later with our custom settings, and *not* log anything for what happens before
+ // `miri` gets started.
+ if env::var("RUSTC_LOG").is_ok() {
rustc_driver::init_rustc_env_logger();
}
}
-fn init_late_loggers() {
- // Initializing loggers right before we start evaluation. We overwrite the RUST_LOG
- // env var if it is not set, control it based on MIRI_LOG.
+fn init_late_loggers(tcx: TyCtxt<'_>) {
+ // We initialize loggers right before we start evaluation. We overwrite the `RUSTC_LOG`
+ // env var if it is not set, control it based on `MIRI_LOG`.
if let Ok(var) = env::var("MIRI_LOG") {
- if env::var("RUST_LOG").is_err() {
- // We try to be a bit clever here: If MIRI_LOG is just a single level
+ if env::var("RUSTC_LOG").is_err() {
+ // We try to be a bit clever here: if `MIRI_LOG` is just a single level
// used for everything, we only apply it to the parts of rustc that are
- // CTFE-related. Otherwise, we use it verbatim for RUST_LOG.
+ // CTFE-related. Otherwise, we use it verbatim for `RUSTC_LOG`.
// This way, if you set `MIRI_LOG=trace`, you get only the right parts of
// rustc traced, but you can also do `MIRI_LOG=miri=trace,rustc_mir::interpret=debug`.
if log::Level::from_str(&var).is_ok() {
- env::set_var("RUST_LOG",
- &format!("rustc::mir::interpret={0},rustc_mir::interpret={0}", var));
+ env::set_var(
+ "RUSTC_LOG",
+ &format!("rustc::mir::interpret={0},rustc_mir::interpret={0}", var),
+ );
} else {
- env::set_var("RUST_LOG", &var);
+ env::set_var("RUSTC_LOG", &var);
}
rustc_driver::init_rustc_env_logger();
}
}
- // If MIRI_BACKTRACE is set and RUST_CTFE_BACKTRACE is not, set RUST_CTFE_BACKTRACE.
- // Do this late, so we really only apply this to miri's errors.
- if let Ok(var) = env::var("MIRI_BACKTRACE") {
- if env::var("RUST_CTFE_BACKTRACE") == Err(env::VarError::NotPresent) {
- env::set_var("RUST_CTFE_BACKTRACE", &var);
- }
+ // If `MIRI_BACKTRACE` is set and `RUSTC_CTFE_BACKTRACE` is not, set `RUSTC_CTFE_BACKTRACE`.
+ // Do this late, so we ideally only apply this to Miri's errors.
+ if let Ok(val) = env::var("MIRI_BACKTRACE") {
+ let ctfe_backtrace = match &*val {
+ "immediate" => CtfeBacktrace::Immediate,
+ "0" => CtfeBacktrace::Disabled,
+ _ => CtfeBacktrace::Capture,
+ };
+ *tcx.sess.ctfe_backtrace.borrow_mut() = ctfe_backtrace;
}
}
-fn find_sysroot() -> String {
- if let Ok(sysroot) = std::env::var("MIRI_SYSROOT") {
- return sysroot;
+/// Returns the "default sysroot" that Miri will use if no `--sysroot` flag is set.
+/// Should be a compile-time constant.
+fn compile_time_sysroot() -> Option<String> {
+ if option_env!("RUSTC_STAGE").is_some() {
+ // This is being built as part of rustc, and gets shipped with rustup.
+ // We can rely on the sysroot computation in librustc.
+ return None;
}
-
- // Taken from https://github.com/Manishearth/rust-clippy/pull/911.
+ // For builds outside rustc, we need to ensure that we got a sysroot
+ // that gets used as a default. The sysroot computation in librustc would
+ // end up somewhere in the build dir.
+ // Taken from PR <https://github.com/Manishearth/rust-clippy/pull/911>.
let home = option_env!("RUSTUP_HOME").or(option_env!("MULTIRUST_HOME"));
let toolchain = option_env!("RUSTUP_TOOLCHAIN").or(option_env!("MULTIRUST_TOOLCHAIN"));
- match (home, toolchain) {
+ Some(match (home, toolchain) {
(Some(home), Some(toolchain)) => format!("{}/toolchains/{}", home, toolchain),
- _ => {
- option_env!("RUST_SYSROOT")
- .expect(
- "Could not find sysroot. Either set MIRI_SYSROOT at run-time, or at \
- build-time specify RUST_SYSROOT env var or use rustup or multirust",
- )
- .to_owned()
- }
- }
+ _ => option_env!("RUST_SYSROOT")
+ .expect("To build Miri without rustup, set the `RUST_SYSROOT` env var at build time")
+ .to_owned(),
+ })
}
fn main() {
init_early_loggers();
- let mut args: Vec<String> = std::env::args().collect();
- // Parse our own -Z flags and remove them before rustc gets their hand on them.
+ // Parse our arguments and split them across `rustc` and `miri`.
let mut validate = true;
- args.retain(|arg| {
- match arg.as_str() {
- "-Zmiri-disable-validation" => {
- validate = false;
- false
- },
- _ => true
+ let mut stacked_borrows = true;
+ let mut communicate = false;
+ let mut ignore_leaks = false;
+ let mut seed: Option<u64> = None;
+ let mut tracked_pointer_tag: Option<miri::PtrId> = None;
+ let mut tracked_alloc_id: Option<miri::AllocId> = None;
+ let mut rustc_args = vec![];
+ let mut miri_args = vec![];
+ let mut after_dashdash = false;
+ let mut excluded_env_vars = vec![];
+ for arg in std::env::args() {
+ if rustc_args.is_empty() {
+ // Very first arg: for `rustc`.
+ rustc_args.push(arg);
+ } else if after_dashdash {
+ // Everything that comes after are `miri` args.
+ miri_args.push(arg);
+ } else {
+ match arg.as_str() {
+ "-Zmiri-disable-validation" => {
+ validate = false;
+ }
+ "-Zmiri-disable-stacked-borrows" => {
+ stacked_borrows = false;
+ }
+ "-Zmiri-disable-isolation" => {
+ communicate = true;
+ }
+ "-Zmiri-ignore-leaks" => {
+ ignore_leaks = true;
+ }
+ "--" => {
+ after_dashdash = true;
+ }
+ arg if arg.starts_with("-Zmiri-seed=") => {
+ if seed.is_some() {
+ panic!("Cannot specify -Zmiri-seed multiple times!");
+ }
+ let seed_raw = hex::decode(arg.trim_start_matches("-Zmiri-seed="))
+ .unwrap_or_else(|err| match err {
+ FromHexError::InvalidHexCharacter { .. } => panic!(
+ "-Zmiri-seed should only contain valid hex digits [0-9a-fA-F]"
+ ),
+ FromHexError::OddLength =>
+ panic!("-Zmiri-seed should have an even number of digits"),
+ err => panic!("Unknown error decoding -Zmiri-seed as hex: {:?}", err),
+ });
+ if seed_raw.len() > 8 {
+ panic!(format!(
+ "-Zmiri-seed must be at most 8 bytes, was {}",
+ seed_raw.len()
+ ));
+ }
+
+ let mut bytes = [0; 8];
+ bytes[..seed_raw.len()].copy_from_slice(&seed_raw);
+ seed = Some(u64::from_be_bytes(bytes));
+ }
+ arg if arg.starts_with("-Zmiri-env-exclude=") => {
+ excluded_env_vars
+ .push(arg.trim_start_matches("-Zmiri-env-exclude=").to_owned());
+ }
+ arg if arg.starts_with("-Zmiri-track-pointer-tag=") => {
+ let id: u64 = match arg.trim_start_matches("-Zmiri-track-pointer-tag=").parse()
+ {
+ Ok(id) => id,
+ Err(err) => panic!(
+ "-Zmiri-track-pointer-tag requires a valid `u64` as the argument: {}",
+ err
+ ),
+ };
+ if let Some(id) = miri::PtrId::new(id) {
+ tracked_pointer_tag = Some(id);
+ } else {
+ panic!("-Zmiri-track-pointer-tag must be a nonzero id");
+ }
+ }
+ arg if arg.starts_with("-Zmiri-track-alloc-id=") => {
+ let id: u64 = match arg.trim_start_matches("-Zmiri-track-alloc-id=").parse()
+ {
+ Ok(id) => id,
+ Err(err) => panic!(
+ "-Zmiri-track-alloc-id requires a valid `u64` as the argument: {}",
+ err
+ ),
+ };
+ tracked_alloc_id = Some(miri::AllocId(id));
+ }
+ _ => {
+ rustc_args.push(arg);
+ }
+ }
}
- });
+ }
- // Determine sysroot and let rustc know about it
- let sysroot_flag = String::from("--sysroot");
- if !args.contains(&sysroot_flag) {
- args.push(sysroot_flag);
- args.push(find_sysroot());
+ // Determine sysroot if needed. Make sure we always call `compile_time_sysroot`
+ // as that also does some sanity-checks of the environment we were built in.
+ // FIXME: Ideally we'd turn a bad build env into a compile-time error, but
+ // CTFE does not seem powerful enough for that yet.
+ if let Some(sysroot) = compile_time_sysroot() {
+ let sysroot_flag = "--sysroot";
+ if !rustc_args.iter().any(|e| e == sysroot_flag) {
+ // We need to overwrite the default that librustc would compute.
+ rustc_args.push(sysroot_flag.to_owned());
+ rustc_args.push(sysroot);
+ }
}
+
// Finally, add the default flags all the way in the beginning, but after the binary name.
- args.splice(1..1, miri::miri_default_args().iter().map(ToString::to_string));
-
- trace!("rustc arguments: {:?}", args);
- let result = rustc_driver::run(move || {
- rustc_driver::run_compiler(&args, Box::new(MiriCompilerCalls {
- default: Box::new(RustcDefaultCalls),
- validate,
- }), None, None)
+ rustc_args.splice(1..1, miri::miri_default_args().iter().map(ToString::to_string));
+
+ debug!("rustc arguments: {:?}", rustc_args);
+ debug!("miri arguments: {:?}", miri_args);
+ let miri_config = miri::MiriConfig {
+ validate,
+ stacked_borrows,
+ communicate,
+ ignore_leaks,
+ excluded_env_vars,
+ seed,
+ args: miri_args,
+ tracked_pointer_tag,
+ tracked_alloc_id,
+ };
+ rustc_driver::install_ice_hook();
+ let result = rustc_driver::catch_fatal_errors(move || {
+ rustc_driver::run_compiler(&rustc_args, &mut MiriCompilerCalls { miri_config }, None, None)
});
- std::process::exit(result as i32);
+ std::process::exit(result.is_err() as i32);
}
projects / rust.git / blobdiff