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Make real_rust_path_dir a TRACKED_NO_CRATE_HASH option

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This also adds support for doc-comments to Options.
This commit is contained in:
Joshua Nelson 2021-04-27 16:25:12 +00:00
parent 272015190d
commit 39648ea467
5 changed files with 52 additions and 36 deletions
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4
compiler/rustc_interface/src/tests.rs
View File

@ -459,6 +459,10 @@ fn test_top_level_options_tracked_no_crate() {
// Make sure that changing a [TRACKED_NO_CRATE_HASH] option leaves the crate hash unchanged but changes the incremental hash.
// This list is in alphabetical order.
tracked!(remap_path_prefix, vec![("/home/bors/rust".into(), "src".into())]);
tracked!(
real_rust_source_base_dir,
Some("/home/bors/rust/.rustup/toolchains/nightly/lib/rustlib/src/rust".into())
);
}
#[test]

6
compiler/rustc_metadata/src/rmeta/decoder.rs
View File

@ -1617,7 +1617,7 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
.map(Path::new)
.filter(|_| {
// Only spend time on further checks if we have what to translate *to*.
sess.real_rust_source_base_dir.is_some()
sess.opts.real_rust_source_base_dir.is_some()
})
.filter(|virtual_dir| {
// Don't translate away `/rustc/$hash` if we're still remapping to it,
@ -1629,11 +1629,11 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
debug!(
"try_to_translate_virtual_to_real(name={:?}): \
virtual_rust_source_base_dir={:?}, real_rust_source_base_dir={:?}",
name, virtual_rust_source_base_dir, sess.real_rust_source_base_dir,
name, virtual_rust_source_base_dir, sess.opts.real_rust_source_base_dir,
);
if let Some(virtual_dir) = virtual_rust_source_base_dir {
if let Some(real_dir) = &sess.real_rust_source_base_dir {
if let Some(real_dir) = &sess.opts.real_rust_source_base_dir {
if let rustc_span::FileName::Real(old_name) = name {
if let rustc_span::RealFileName::Named(one_path) = old_name {
if let Ok(rest) = one_path.strip_prefix(virtual_dir) {

30
compiler/rustc_session/src/config.rs
View File

@ -702,6 +702,7 @@ impl Default for Options {
cli_forced_codegen_units: None,
cli_forced_thinlto_off: false,
remap_path_prefix: Vec::new(),
real_rust_source_base_dir: None,
edition: DEFAULT_EDITION,
json_artifact_notifications: false,
json_unused_externs: false,
@ -1980,6 +1981,34 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options {
}
}
// Try to find a directory containing the Rust `src`, for more details see
// the doc comment on the `real_rust_source_base_dir` field.
let tmp_buf;
let sysroot = match &sysroot_opt {
Some(s) => s,
None => {
tmp_buf = crate::filesearch::get_or_default_sysroot();
&tmp_buf
}
};
let real_rust_source_base_dir = {
// This is the location used by the `rust-src` `rustup` component.
let mut candidate = sysroot.join("lib/rustlib/src/rust");
if let Ok(metadata) = candidate.symlink_metadata() {
// Replace the symlink rustbuild creates, with its destination.
// We could try to use `fs::canonicalize` instead, but that might
// produce unnecessarily verbose path.
if metadata.file_type().is_symlink() {
if let Ok(symlink_dest) = std::fs::read_link(&candidate) {
candidate = symlink_dest;
}
}
}
// Only use this directory if it has a file we can expect to always find.
if candidate.join("library/std/src/lib.rs").is_file() { Some(candidate) } else { None }
};
Options {
crate_types,
optimize: opt_level,
@ -2010,6 +2039,7 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options {
cli_forced_codegen_units: codegen_units,
cli_forced_thinlto_off: disable_thinlto,
remap_path_prefix,
real_rust_source_base_dir,
edition,
json_artifact_notifications,
json_unused_externs,

18
compiler/rustc_session/src/options.rs
View File

@ -54,11 +54,15 @@ macro_rules! hash_substruct {
macro_rules! top_level_options {
(pub struct Options { $(
$( #[$attr:meta] )*
$opt:ident : $t:ty [$dep_tracking_marker:ident],
)* } ) => (
#[derive(Clone)]
pub struct Options {
$(pub $opt: $t),*
$(
$( #[$attr] )*
pub $opt: $t
),*
}
impl Options {
@ -174,6 +178,14 @@ top_level_options!(
// Remap source path prefixes in all output (messages, object files, debug, etc.).
remap_path_prefix: Vec<(PathBuf, PathBuf)> [TRACKED_NO_CRATE_HASH],
/// Base directory containing the `src/` for the Rust standard library, and
/// potentially `rustc` as well, if we can can find it. Right now it's always
/// `$sysroot/lib/rustlib/src/rust` (i.e. the `rustup` `rust-src` component).
///
/// This directory is what the virtual `/rustc/$hash` is translated back to,
/// if Rust was built with path remapping to `/rustc/$hash` enabled
/// (the `rust.remap-debuginfo` option in `config.toml`).
real_rust_source_base_dir: Option<PathBuf> [TRACKED_NO_CRATE_HASH],
edition: Edition [TRACKED],
@ -254,13 +266,13 @@ macro_rules! options {
}
impl $struct_name {
fn dep_tracking_hash(&self, for_crate_hash: bool, error_format: ErrorOutputType) -> u64 {
fn dep_tracking_hash(&self, _for_crate_hash: bool, error_format: ErrorOutputType) -> u64 {
let mut sub_hashes = BTreeMap::new();
$({
hash_opt!($opt,
&self.$opt,
&mut sub_hashes,
for_crate_hash,
_for_crate_hash,
[$dep_tracking_marker]);
})*
let mut hasher = DefaultHasher::new();

30
compiler/rustc_session/src/session.rs
View File

@ -214,15 +214,6 @@ pub struct Session {
/// drown everything else in noise.
miri_unleashed_features: Lock<Vec<(Span, Option<Symbol>)>>,
/// Base directory containing the `src/` for the Rust standard library, and
/// potentially `rustc` as well, if we can can find it. Right now it's always
/// `$sysroot/lib/rustlib/src/rust` (i.e. the `rustup` `rust-src` component).
///
/// This directory is what the virtual `/rustc/$hash` is translated back to,
/// if Rust was built with path remapping to `/rustc/$hash` enabled
/// (the `rust.remap-debuginfo` option in `config.toml`).
pub real_rust_source_base_dir: Option<PathBuf>,
/// Architecture to use for interpreting asm!.
pub asm_arch: Option<InlineAsmArch>,
@ -1390,26 +1381,6 @@ pub fn build_session(
_ => CtfeBacktrace::Disabled,
});
// Try to find a directory containing the Rust `src`, for more details see
// the doc comment on the `real_rust_source_base_dir` field.
let real_rust_source_base_dir = {
// This is the location used by the `rust-src` `rustup` component.
let mut candidate = sysroot.join("lib/rustlib/src/rust");
if let Ok(metadata) = candidate.symlink_metadata() {
// Replace the symlink rustbuild creates, with its destination.
// We could try to use `fs::canonicalize` instead, but that might
// produce unnecessarily verbose path.
if metadata.file_type().is_symlink() {
if let Ok(symlink_dest) = std::fs::read_link(&candidate) {
candidate = symlink_dest;
}
}
}
// Only use this directory if it has a file we can expect to always find.
if candidate.join("library/std/src/lib.rs").is_file() { Some(candidate) } else { None }
};
let asm_arch =
if target_cfg.allow_asm { InlineAsmArch::from_str(&target_cfg.arch).ok() } else { None };
@ -1453,7 +1424,6 @@ pub fn build_session(
system_library_path: OneThread::new(RefCell::new(Default::default())),
ctfe_backtrace,
miri_unleashed_features: Lock::new(Default::default()),
real_rust_source_base_dir,
asm_arch,
target_features: FxHashSet::default(),
known_attrs: Lock::new(MarkedAttrs::new()),