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use crate::cstore::{self, LoadedMacro};
use crate::encoder;
use crate::link_args;
use crate::native_libs;
use crate::foreign_modules;
use crate::schema;
use rustc::ty::query::QueryConfig;
use rustc::middle::cstore::{CrateStore, DepKind,
EncodedMetadata, NativeLibraryKind};
use rustc::middle::exported_symbols::ExportedSymbol;
use rustc::middle::stability::DeprecationEntry;
use rustc::hir::def;
use rustc::hir;
use rustc::session::{CrateDisambiguator, Session};
use rustc::ty::{self, TyCtxt};
use rustc::ty::query::Providers;
use rustc::hir::def_id::{CrateNum, DefId, LOCAL_CRATE, CRATE_DEF_INDEX};
use rustc::hir::map::{DefKey, DefPath, DefPathHash};
use rustc::hir::map::definitions::DefPathTable;
use rustc::util::nodemap::DefIdMap;
use rustc_data_structures::svh::Svh;
use smallvec::SmallVec;
use std::any::Any;
use rustc_data_structures::sync::Lrc;
use std::sync::Arc;
use syntax::ast;
use syntax::attr;
use syntax::source_map;
use syntax::edition::Edition;
use syntax::ext::base::{SyntaxExtension, SyntaxExtensionKind};
use syntax::parse::source_file_to_stream;
use syntax::parse::parser::emit_unclosed_delims;
use syntax::symbol::{Symbol, sym};
use syntax_ext::proc_macro_impl::BangProcMacro;
use syntax_pos::{Span, NO_EXPANSION, FileName};
use rustc_data_structures::bit_set::BitSet;
macro_rules! provide {
(<$lt:tt> $tcx:ident, $def_id:ident, $other:ident, $cdata:ident,
$($name:ident => $compute:block)*) => {
pub fn provide_extern<$lt>(providers: &mut Providers<$lt>) {
// HACK(eddyb) `$lt: $lt` forces `$lt` to be early-bound, which
// allows the associated type in the return type to be normalized.
$(fn $name<$lt: $lt, T: IntoArgs>(
$tcx: TyCtxt<$lt>,
def_id_arg: T,
) -> <ty::queries::$name<$lt> as QueryConfig<$lt>>::Value {
#[allow(unused_variables)]
let ($def_id, $other) = def_id_arg.into_args();
assert!(!$def_id.is_local());
let def_path_hash = $tcx.def_path_hash(DefId {
krate: $def_id.krate,
index: CRATE_DEF_INDEX
});
let dep_node = def_path_hash
.to_dep_node(rustc::dep_graph::DepKind::CrateMetadata);
// The DepNodeIndex of the DepNode::CrateMetadata should be
// cached somewhere, so that we can use read_index().
$tcx.dep_graph.read(dep_node);
let $cdata = $tcx.crate_data_as_rc_any($def_id.krate);
let $cdata = $cdata.downcast_ref::<cstore::CrateMetadata>()
.expect("CrateStore created data is not a CrateMetadata");
$compute
})*
*providers = Providers {
$($name,)*
..*providers
};
}
}
}
// small trait to work around different signature queries all being defined via
// the macro above.
trait IntoArgs {
fn into_args(self) -> (DefId, DefId);
}
impl IntoArgs for DefId {
fn into_args(self) -> (DefId, DefId) { (self, self) }
}
impl IntoArgs for CrateNum {
fn into_args(self) -> (DefId, DefId) { (self.as_def_id(), self.as_def_id()) }
}
impl IntoArgs for (CrateNum, DefId) {
fn into_args(self) -> (DefId, DefId) { (self.0.as_def_id(), self.1) }
}
provide! { <'tcx> tcx, def_id, other, cdata,
type_of => { cdata.get_type(def_id.index, tcx) }
generics_of => {
tcx.arena.alloc(cdata.get_generics(def_id.index, tcx.sess))
}
predicates_of => { tcx.arena.alloc(cdata.get_predicates(def_id.index, tcx)) }
predicates_defined_on => {
tcx.arena.alloc(cdata.get_predicates_defined_on(def_id.index, tcx))
}
super_predicates_of => { tcx.arena.alloc(cdata.get_super_predicates(def_id.index, tcx)) }
trait_def => {
tcx.arena.alloc(cdata.get_trait_def(def_id.index, tcx.sess))
}
adt_def => { cdata.get_adt_def(def_id.index, tcx) }
adt_destructor => {
let _ = cdata;
tcx.calculate_dtor(def_id, &mut |_,_| Ok(()))
}
variances_of => { tcx.arena.alloc_from_iter(cdata.get_item_variances(def_id.index)) }
associated_item_def_ids => {
let mut result = SmallVec::<[_; 8]>::new();
cdata.each_child_of_item(def_id.index,
|child| result.push(child.res.def_id()), tcx.sess);
tcx.arena.alloc_slice(&result)
}
associated_item => { cdata.get_associated_item(def_id.index) }
impl_trait_ref => { cdata.get_impl_trait(def_id.index, tcx) }
impl_polarity => { cdata.get_impl_polarity(def_id.index) }
coerce_unsized_info => {
cdata.get_coerce_unsized_info(def_id.index).unwrap_or_else(|| {
bug!("coerce_unsized_info: `{:?}` is missing its info", def_id);
})
}
optimized_mir => {
let mir = cdata.maybe_get_optimized_mir(tcx, def_id.index).unwrap_or_else(|| {
bug!("get_optimized_mir: missing MIR for `{:?}`", def_id)
});
let mir = tcx.arena.alloc(mir);
mir
}
mir_const_qualif => {
(cdata.mir_const_qualif(def_id.index), tcx.arena.alloc(BitSet::new_empty(0)))
}
fn_sig => { cdata.fn_sig(def_id.index, tcx) }
inherent_impls => { cdata.get_inherent_implementations_for_type(tcx, def_id.index) }
is_const_fn_raw => { cdata.is_const_fn_raw(def_id.index) }
is_foreign_item => { cdata.is_foreign_item(def_id.index) }
static_mutability => { cdata.static_mutability(def_id.index) }
def_kind => { cdata.def_kind(def_id.index) }
def_span => { cdata.get_span(def_id.index, &tcx.sess) }
lookup_stability => {
cdata.get_stability(def_id.index).map(|s| tcx.intern_stability(s))
}
lookup_deprecation_entry => {
cdata.get_deprecation(def_id.index).map(DeprecationEntry::external)
}
item_attrs => { cdata.get_item_attrs(def_id.index, tcx.sess) }
// FIXME(#38501) We've skipped a `read` on the `HirBody` of
// a `fn` when encoding, so the dep-tracking wouldn't work.
// This is only used by rustdoc anyway, which shouldn't have
// incremental recompilation ever enabled.
fn_arg_names => { cdata.get_fn_arg_names(def_id.index) }
rendered_const => { cdata.get_rendered_const(def_id.index) }
impl_parent => { cdata.get_parent_impl(def_id.index) }
trait_of_item => { cdata.get_trait_of_item(def_id.index) }
const_is_rvalue_promotable_to_static => {
cdata.const_is_rvalue_promotable_to_static(def_id.index)
}
is_mir_available => { cdata.is_item_mir_available(def_id.index) }
dylib_dependency_formats => { cdata.get_dylib_dependency_formats(tcx) }
is_panic_runtime => { cdata.root.panic_runtime }
is_compiler_builtins => { cdata.root.compiler_builtins }
has_global_allocator => { cdata.root.has_global_allocator }
has_panic_handler => { cdata.root.has_panic_handler }
is_sanitizer_runtime => { cdata.root.sanitizer_runtime }
is_profiler_runtime => { cdata.root.profiler_runtime }
panic_strategy => { cdata.root.panic_strategy }
extern_crate => {
let r = *cdata.extern_crate.lock();
r.map(|c| &*tcx.arena.alloc(c))
}
is_no_builtins => { cdata.root.no_builtins }
symbol_mangling_version => { cdata.root.symbol_mangling_version }
impl_defaultness => { cdata.get_impl_defaultness(def_id.index) }
reachable_non_generics => {
let reachable_non_generics = tcx
.exported_symbols(cdata.cnum)
.iter()
.filter_map(|&(exported_symbol, export_level)| {
if let ExportedSymbol::NonGeneric(def_id) = exported_symbol {
return Some((def_id, export_level))
} else {
None
}
})
.collect();
tcx.arena.alloc(reachable_non_generics)
}
native_libraries => { Lrc::new(cdata.get_native_libraries(tcx.sess)) }
foreign_modules => { cdata.get_foreign_modules(tcx) }
plugin_registrar_fn => {
cdata.root.plugin_registrar_fn.map(|index| {
DefId { krate: def_id.krate, index }
})
}
proc_macro_decls_static => {
cdata.root.proc_macro_decls_static.map(|index| {
DefId { krate: def_id.krate, index }
})
}
crate_disambiguator => { cdata.root.disambiguator }
crate_hash => { cdata.root.hash }
original_crate_name => { cdata.root.name }
extra_filename => { cdata.root.extra_filename.clone() }
implementations_of_trait => {
cdata.get_implementations_for_trait(tcx, Some(other))
}
all_trait_implementations => {
cdata.get_implementations_for_trait(tcx, None)
}
visibility => { cdata.get_visibility(def_id.index) }
dep_kind => {
let r = *cdata.dep_kind.lock();
r
}
crate_name => { cdata.name }
item_children => {
let mut result = SmallVec::<[_; 8]>::new();
cdata.each_child_of_item(def_id.index, |child| result.push(child), tcx.sess);
tcx.arena.alloc_slice(&result)
}
defined_lib_features => { cdata.get_lib_features(tcx) }
defined_lang_items => { cdata.get_lang_items(tcx) }
missing_lang_items => { cdata.get_missing_lang_items(tcx) }
missing_extern_crate_item => {
let r = match *cdata.extern_crate.borrow() {
Some(extern_crate) if !extern_crate.direct => true,
_ => false,
};
r
}
used_crate_source => { Lrc::new(cdata.source.clone()) }
exported_symbols => { Arc::new(cdata.exported_symbols(tcx)) }
}
pub fn provide(providers: &mut Providers<'_>) {
// FIXME(#44234) - almost all of these queries have no sub-queries and
// therefore no actual inputs, they're just reading tables calculated in
// resolve! Does this work? Unsure! That's what the issue is about
*providers = Providers {
is_dllimport_foreign_item: |tcx, id| {
tcx.native_library_kind(id) == Some(NativeLibraryKind::NativeUnknown)
},
is_statically_included_foreign_item: |tcx, id| {
match tcx.native_library_kind(id) {
Some(NativeLibraryKind::NativeStatic) |
Some(NativeLibraryKind::NativeStaticNobundle) => true,
_ => false,
}
},
native_library_kind: |tcx, id| {
tcx.native_libraries(id.krate)
.iter()
.filter(|lib| native_libs::relevant_lib(&tcx.sess, lib))
.find(|lib| {
let fm_id = match lib.foreign_module {
Some(id) => id,
None => return false,
};
tcx.foreign_modules(id.krate)
.iter()
.find(|m| m.def_id == fm_id)
.expect("failed to find foreign module")
.foreign_items
.contains(&id)
})
.map(|l| l.kind)
},
native_libraries: |tcx, cnum| {
assert_eq!(cnum, LOCAL_CRATE);
Lrc::new(native_libs::collect(tcx))
},
foreign_modules: |tcx, cnum| {
assert_eq!(cnum, LOCAL_CRATE);
&tcx.arena.alloc(foreign_modules::collect(tcx))[..]
},
link_args: |tcx, cnum| {
assert_eq!(cnum, LOCAL_CRATE);
Lrc::new(link_args::collect(tcx))
},
// Returns a map from a sufficiently visible external item (i.e., an
// external item that is visible from at least one local module) to a
// sufficiently visible parent (considering modules that re-export the
// external item to be parents).
visible_parent_map: |tcx, cnum| {
use std::collections::vec_deque::VecDeque;
use std::collections::hash_map::Entry;
assert_eq!(cnum, LOCAL_CRATE);
let mut visible_parent_map: DefIdMap<DefId> = Default::default();
// Issue 46112: We want the map to prefer the shortest
// paths when reporting the path to an item. Therefore we
// build up the map via a breadth-first search (BFS),
// which naturally yields minimal-length paths.
//
// Note that it needs to be a BFS over the whole forest of
// crates, not just each individual crate; otherwise you
// only get paths that are locally minimal with respect to
// whatever crate we happened to encounter first in this
// traversal, but not globally minimal across all crates.
let bfs_queue = &mut VecDeque::new();
// Preferring shortest paths alone does not guarantee a
// deterministic result; so sort by crate num to avoid
// hashtable iteration non-determinism. This only makes
// things as deterministic as crate-nums assignment is,
// which is to say, its not deterministic in general. But
// we believe that libstd is consistently assigned crate
// num 1, so it should be enough to resolve #46112.
let mut crates: Vec<CrateNum> = (*tcx.crates()).to_owned();
crates.sort();
for &cnum in crates.iter() {
// Ignore crates without a corresponding local `extern crate` item.
if tcx.missing_extern_crate_item(cnum) {
continue
}
bfs_queue.push_back(DefId {
krate: cnum,
index: CRATE_DEF_INDEX
});
}
// (restrict scope of mutable-borrow of `visible_parent_map`)
{
let visible_parent_map = &mut visible_parent_map;
let mut add_child = |bfs_queue: &mut VecDeque<_>,
child: &def::Export<hir::HirId>,
parent: DefId| {
if child.vis != ty::Visibility::Public {
return;
}
if let Some(child) = child.res.opt_def_id() {
match visible_parent_map.entry(child) {
Entry::Occupied(mut entry) => {
// If `child` is defined in crate `cnum`, ensure
// that it is mapped to a parent in `cnum`.
if child.krate == cnum && entry.get().krate != cnum {
entry.insert(parent);
}
}
Entry::Vacant(entry) => {
entry.insert(parent);
bfs_queue.push_back(child);
}
}
}
};
while let Some(def) = bfs_queue.pop_front() {
for child in tcx.item_children(def).iter() {
add_child(bfs_queue, child, def);
}
}
}
tcx.arena.alloc(visible_parent_map)
},
..*providers
};
}
impl cstore::CStore {
pub fn export_macros_untracked(&self, cnum: CrateNum) {
let data = self.get_crate_data(cnum);
let mut dep_kind = data.dep_kind.lock();
if *dep_kind == DepKind::UnexportedMacrosOnly {
*dep_kind = DepKind::MacrosOnly;
}
}
pub fn dep_kind_untracked(&self, cnum: CrateNum) -> DepKind {
let data = self.get_crate_data(cnum);
let r = *data.dep_kind.lock();
r
}
pub fn crate_edition_untracked(&self, cnum: CrateNum) -> Edition {
self.get_crate_data(cnum).root.edition
}
pub fn struct_field_names_untracked(&self, def: DefId) -> Vec<ast::Name> {
self.get_crate_data(def.krate).get_struct_field_names(def.index)
}
pub fn ctor_kind_untracked(&self, def: DefId) -> def::CtorKind {
self.get_crate_data(def.krate).get_ctor_kind(def.index)
}
pub fn item_attrs_untracked(&self, def: DefId, sess: &Session) -> Lrc<[ast::Attribute]> {
self.get_crate_data(def.krate).get_item_attrs(def.index, sess)
}
pub fn item_children_untracked(
&self,
def_id: DefId,
sess: &Session
) -> Vec<def::Export<hir::HirId>> {
let mut result = vec![];
self.get_crate_data(def_id.krate)
.each_child_of_item(def_id.index, |child| result.push(child), sess);
result
}
pub fn load_macro_untracked(&self, id: DefId, sess: &Session) -> LoadedMacro {
let data = self.get_crate_data(id.krate);
if let Some(ref proc_macros) = data.proc_macros {
return LoadedMacro::ProcMacro(proc_macros[id.index.to_proc_macro_index()].1.clone());
} else if data.name == sym::proc_macro && data.item_name(id.index) == sym::quote {
let client = proc_macro::bridge::client::Client::expand1(proc_macro::quote);
let kind = SyntaxExtensionKind::Bang(Box::new(BangProcMacro { client }));
let ext = SyntaxExtension {
allow_internal_unstable: Some([sym::proc_macro_def_site][..].into()),
..SyntaxExtension::default(kind, data.root.edition)
};
return LoadedMacro::ProcMacro(Lrc::new(ext));
}
let def = data.get_macro(id.index);
let macro_full_name = data.def_path(id.index).to_string_friendly(|_| data.imported_name);
let source_name = FileName::Macros(macro_full_name);
let source_file = sess.parse_sess.source_map().new_source_file(source_name, def.body);
let local_span = Span::new(source_file.start_pos, source_file.end_pos, NO_EXPANSION);
let (body, mut errors) = source_file_to_stream(&sess.parse_sess, source_file, None);
emit_unclosed_delims(&mut errors, &sess.diagnostic());
// Mark the attrs as used
let attrs = data.get_item_attrs(id.index, sess);
for attr in attrs.iter() {
attr::mark_used(attr);
}
let name = data.def_key(id.index).disambiguated_data.data
.get_opt_name().expect("no name in load_macro");
sess.imported_macro_spans.borrow_mut()
.insert(local_span, (name.to_string(), data.get_span(id.index, sess)));
LoadedMacro::MacroDef(ast::Item {
ident: ast::Ident::from_str(&name.as_str()),
id: ast::DUMMY_NODE_ID,
span: local_span,
attrs: attrs.iter().cloned().collect(),
node: ast::ItemKind::MacroDef(ast::MacroDef {
tokens: body.into(),
legacy: def.legacy,
}),
vis: source_map::respan(local_span.shrink_to_lo(), ast::VisibilityKind::Inherited),
tokens: None,
})
}
pub fn associated_item_cloned_untracked(&self, def: DefId) -> ty::AssocItem {
self.get_crate_data(def.krate).get_associated_item(def.index)
}
}
impl CrateStore for cstore::CStore {
fn crate_data_as_rc_any(&self, krate: CrateNum) -> Lrc<dyn Any> {
self.get_crate_data(krate)
}
fn item_generics_cloned_untracked(&self, def: DefId, sess: &Session) -> ty::Generics {
self.get_crate_data(def.krate).get_generics(def.index, sess)
}
fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol
{
self.get_crate_data(cnum).name
}
fn crate_is_private_dep_untracked(&self, cnum: CrateNum) -> bool {
self.get_crate_data(cnum).private_dep
}
fn crate_disambiguator_untracked(&self, cnum: CrateNum) -> CrateDisambiguator
{
self.get_crate_data(cnum).root.disambiguator
}
fn crate_hash_untracked(&self, cnum: CrateNum) -> Svh
{
self.get_crate_data(cnum).root.hash
}
/// Returns the `DefKey` for a given `DefId`. This indicates the
/// parent `DefId` as well as some idea of what kind of data the
/// `DefId` refers to.
fn def_key(&self, def: DefId) -> DefKey {
// Note: loading the def-key (or def-path) for a def-id is not
// a *read* of its metadata. This is because the def-id is
// really just an interned shorthand for a def-path, which is the
// canonical name for an item.
//
// self.dep_graph.read(DepNode::MetaData(def));
self.get_crate_data(def.krate).def_key(def.index)
}
fn def_path(&self, def: DefId) -> DefPath {
// See `Note` above in `def_key()` for why this read is
// commented out:
//
// self.dep_graph.read(DepNode::MetaData(def));
self.get_crate_data(def.krate).def_path(def.index)
}
fn def_path_hash(&self, def: DefId) -> DefPathHash {
self.get_crate_data(def.krate).def_path_hash(def.index)
}
fn def_path_table(&self, cnum: CrateNum) -> Lrc<DefPathTable> {
self.get_crate_data(cnum).def_path_table.clone()
}
fn crates_untracked(&self) -> Vec<CrateNum>
{
let mut result = vec![];
self.iter_crate_data(|cnum, _| result.push(cnum));
result
}
fn extern_mod_stmt_cnum_untracked(&self, emod_id: ast::NodeId) -> Option<CrateNum>
{
self.do_extern_mod_stmt_cnum(emod_id)
}
fn postorder_cnums_untracked(&self) -> Vec<CrateNum> {
self.do_postorder_cnums_untracked()
}
fn encode_metadata(&self, tcx: TyCtxt<'_>) -> EncodedMetadata {
encoder::encode_metadata(tcx)
}
fn metadata_encoding_version(&self) -> &[u8]
{
schema::METADATA_HEADER
}
}
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