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do not auto-detect the targets in the sysroot, instead specify target manually through env var #570

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merged 1 commit into from
Dec 12, 2018
Merged

do not auto-detect the targets in the sysroot, instead specify target manually through env var #570

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14 changes: 8 additions & 6 deletions .travis.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,12 @@ before_script:
else
export MIRI_SYSROOT_BASE=~/.cache/miri/
fi
- |
if [[ "$TRAVIS_OS_NAME" == osx ]]; then
FOREIGN_TARGET=i686-apple-darwin
else
FOREIGN_TARGET=i686-unknown-linux-gnu
fi
# install Rust
- curl https://build.travis-ci.org/files/rustup-init.sh -sSf | sh -s -- -y --default-toolchain "$RUST_TOOLCHAIN"
- export PATH=$HOME/.cargo/bin:$PATH
Expand All @@ -43,15 +49,11 @@ script:
- |
# Get ourselves a MIR-full libstd for the host and a foreign architecture
cargo miri setup &&
if [[ "$TRAVIS_OS_NAME" == osx ]]; then
cargo miri setup --target i686-apple-darwin
else
cargo miri setup --target i686-unknown-linux-gnu
fi
cargo miri setup --target "$FOREIGN_TARGET"
- |
# Test miri with full MIR, on the host and other architectures
MIRI_SYSROOT=$MIRI_SYSROOT_BASE/HOST cargo test --release --all-features &&
MIRI_SYSROOT=$MIRI_SYSROOT_BASE cargo test --release --all-features
MIRI_SYSROOT=$MIRI_SYSROOT_BASE MIRI_TARGET=$FOREIGN_TARGET cargo test --release --all-features
- |
# Test cargo integration
(cd test-cargo-miri && MIRI_SYSROOT=$MIRI_SYSROOT_BASE/HOST ./run-test.py)
Expand Down
12 changes: 10 additions & 2 deletions README.md
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Expand Up @@ -154,9 +154,9 @@ MIRI_LOG=rustc_mir::interpret=debug,miri::stacked_borrows cargo run tests/run-pa
In addition, you can set `MIRI_BACKTRACE=1` to get a backtrace of where an
evaluation error was originally created.

### Miri `-Z` flags
### Miri `-Z` flags and environment variables

Several `-Z` flags are relevant for miri:
Several `-Z` flags are relevant for Miri:

* `-Zmir-opt-level` controls how many MIR optimizations are performed. miri
overrides the default to be `0`; be advised that using any higher level can
Expand All @@ -168,6 +168,14 @@ Several `-Z` flags are relevant for miri:
enforcing the validity invariant, which is enforced by default. This is
mostly useful for debugging; it means miri will miss bugs in your program.

Moreover, Miri recognizes some environment variables:

* `MIRI_SYSROOT` (recognized by `miri`, `cargo miri` and the test suite)
indicates the sysroot to use.
* `MIRI_TARGET` (recognized by the test suite) indicates which target
architecture to test against. `miri` and `cargo miri` accept the `--target`
flag for the same purpose.

## Contributing and getting help

Check out the issues on this GitHub repository for some ideas. There's lots that
Expand Down
89 changes: 23 additions & 66 deletions tests/compiletest.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -34,10 +34,11 @@ fn mk_config(mode: &str) -> compiletest::common::ConfigWithTemp {
config.compile_lib_path = rustc_lib_path();
}
config.filter = env::args().nth(1);
config.host = get_host();
config
}

fn compile_fail(sysroot: &Path, path: &str, target: &str, host: &str, opt: bool) {
fn compile_fail(path: &str, target: &str, opt: bool) {
let opt_str = if opt { " with optimizations" } else { "" };
eprintln!("{}", format!(
"## Running compile-fail tests in {} against miri for target {}{}",
Expand All @@ -47,7 +48,6 @@ fn compile_fail(sysroot: &Path, path: &str, target: &str, host: &str, opt: bool)
).green().bold());

let mut flags = Vec::new();
flags.push(format!("--sysroot {}", sysroot.display()));
flags.push("-Dwarnings -Dunused".to_owned()); // overwrite the -Aunused in compiletest-rs
flags.push("--edition 2018".to_owned());
if opt {
Expand All @@ -60,12 +60,11 @@ fn compile_fail(sysroot: &Path, path: &str, target: &str, host: &str, opt: bool)
let mut config = mk_config("compile-fail");
config.src_base = PathBuf::from(path);
config.target = target.to_owned();
config.host = host.to_owned();
config.target_rustcflags = Some(flags.join(" "));
compiletest::run_tests(&config);
}

fn miri_pass(sysroot: &Path, path: &str, target: &str, host: &str, opt: bool) {
fn miri_pass(path: &str, target: &str, opt: bool) {
let opt_str = if opt { " with optimizations" } else { "" };
eprintln!("{}", format!(
"## Running run-pass tests in {} against miri for target {}{}",
Expand All @@ -75,7 +74,6 @@ fn miri_pass(sysroot: &Path, path: &str, target: &str, host: &str, opt: bool) {
).green().bold());

let mut flags = Vec::new();
flags.push(format!("--sysroot {}", sysroot.display()));
flags.push("-Dwarnings -Dunused".to_owned()); // overwrite the -Aunused in compiletest-rs
flags.push("--edition 2018".to_owned());
if opt {
Expand All @@ -87,57 +85,24 @@ fn miri_pass(sysroot: &Path, path: &str, target: &str, host: &str, opt: bool) {
let mut config = mk_config("ui");
config.src_base = PathBuf::from(path);
config.target = target.to_owned();
config.host = host.to_owned();
config.target_rustcflags = Some(flags.join(" "));
compiletest::run_tests(&config);
}

fn is_target_dir<P: Into<PathBuf>>(path: P) -> bool {
let mut path = path.into();
path.push("lib");
path.metadata().map(|m| m.is_dir()).unwrap_or(false)
}

fn target_has_std<P: Into<PathBuf>>(path: P) -> bool {
let mut path = path.into();
path.push("lib");
std::fs::read_dir(path)
.expect("invalid target")
.map(|entry| entry.unwrap())
.filter(|entry| entry.file_type().unwrap().is_file())
.filter_map(|entry| entry.file_name().into_string().ok())
.any(|file_name| file_name == "libstd.rlib")
}


fn for_all_targets<F: FnMut(String)>(sysroot: &Path, f: F) {
let target_dir = sysroot.join("lib").join("rustlib");
let mut targets = std::fs::read_dir(target_dir)
.expect("invalid sysroot")
.map(|entry| entry.unwrap())
.filter(|entry| is_target_dir(entry.path()))
.filter(|entry| target_has_std(entry.path()))
.map(|entry| entry.file_name().into_string().unwrap())
.peekable();

if targets.peek().is_none() {
panic!("No valid targets found");
/// Make sure the MIRI_SYSROOT env var is set
fn set_sysroot() {
if std::env::var("MIRI_SYSROOT").is_ok() {
// Nothing to do
return;
}

targets.for_each(f);
}

fn get_sysroot() -> PathBuf {
let sysroot = std::env::var("MIRI_SYSROOT").unwrap_or_else(|_| {
let sysroot = std::process::Command::new("rustc")
.arg("--print")
.arg("sysroot")
.output()
.expect("rustc not found")
.stdout;
String::from_utf8(sysroot).expect("sysroot is not utf8")
});
PathBuf::from(sysroot.trim())
let sysroot = std::process::Command::new("rustc")
.arg("--print")
.arg("sysroot")
.output()
.expect("rustc not found")
.stdout;
let sysroot = String::from_utf8(sysroot).expect("sysroot is not utf8");
std::env::set_var("MIRI_SYSROOT", sysroot.trim());
}

fn get_host() -> String {
Expand All @@ -153,28 +118,20 @@ fn get_host() -> String {
version_meta.host
}

fn run_pass_miri(opt: bool) {
let sysroot = get_sysroot();
let host = get_host();
fn get_target() -> String {
std::env::var("MIRI_TARGET").unwrap_or_else(|_| get_host())
}

for_all_targets(&sysroot, |target| {
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with this missing, CI isn't testing all the targets anymore that it was testing before

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CI is testing exactly the same targets as before: .travis-ci.yml now calls cargo test multiple times to do that.

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Oh. I misread what's happening, we're just testing one target other than the host. I was looking for some kind of loop

miri_pass(&sysroot, "tests/run-pass", &target, &host, opt);
});
fn run_pass_miri(opt: bool) {
miri_pass("tests/run-pass", &get_target(), opt);
}

fn compile_fail_miri(opt: bool) {
let sysroot = get_sysroot();
let host = get_host();

for_all_targets(&sysroot, |target| {
compile_fail(&sysroot, "tests/compile-fail", &target, &host, opt);
});
compile_fail("tests/compile-fail", &get_target(), opt);
}

fn test_runner(_tests: &[&()]) {
// We put everything into a single test to avoid the parallelism `cargo test`
// introduces. We still get parallelism within our tests because `compiletest`
// uses `libtest` which runs jobs in parallel.
set_sysroot();

run_pass_miri(false);
run_pass_miri(true);
Expand Down