1 // Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
13 use middle::def_id::DefId;
16 use std::fs::{self, File};
17 use std::path::{Path, PathBuf};
20 use rustc::front::map::NodeItem;
21 use rustc_front::{hir, lowering};
24 use syntax::ast::{self, NodeId};
26 use syntax::codemap::*;
27 use syntax::parse::token::{self, keywords};
28 use syntax::visit::{self, Visitor};
29 use syntax::print::pprust::ty_to_string;
31 use self::span_utils::SpanUtils;
39 pub struct SaveContext<'l, 'tcx: 'l> {
40 tcx: &'l ty::ctxt<'tcx>,
41 lcx: &'l lowering::LoweringContext<'l, 'tcx>,
42 span_utils: SpanUtils<'l>,
45 pub struct CrateData {
50 /// Data for any entity in the Rust language. The actual data contained varied
51 /// with the kind of entity being queried. See the nested structs for details.
54 /// Data for all kinds of functions and methods.
55 FunctionData(FunctionData),
56 /// Data for local and global variables (consts and statics), and fields.
57 VariableData(VariableData),
65 /// Data for the use of some variable (e.g., the use of a local variable, which
66 /// will refere to that variables declaration).
67 VariableRefData(VariableRefData),
68 /// Data for a reference to a type or trait.
69 TypeRefData(TypeRefData),
70 /// Data for a reference to a module.
71 ModRefData(ModRefData),
72 /// Data about a function call.
73 FunctionCallData(FunctionCallData),
74 /// Data about a method call.
75 MethodCallData(MethodCallData),
78 /// Data for all kinds of functions and methods.
80 pub struct FunctionData {
84 pub declaration: Option<DefId>,
89 /// Data for local and global variables (consts and statics).
91 pub struct VariableData {
98 pub type_value: String,
101 /// Data for modules.
106 pub qualname: String,
109 pub filename: String,
112 /// Data for enum declarations.
114 pub struct EnumData {
117 pub qualname: String,
123 pub struct ImplData {
127 // FIXME: I'm not really sure inline data is the best way to do this. Seems
128 // OK in this case, but generalising leads to returning chunks of AST, which
130 pub trait_ref: Option<TypeRefData>,
131 pub self_ref: Option<TypeRefData>,
134 /// Data for the use of some item (e.g., the use of a local variable, which
135 /// will refer to that variables declaration (by ref_id)).
137 pub struct VariableRefData {
144 /// Data for a reference to a type or trait.
146 pub struct TypeRefData {
152 /// Data for a reference to a module.
154 pub struct ModRefData {
160 /// Data about a function call.
162 pub struct FunctionCallData {
168 /// Data about a method call.
170 pub struct MethodCallData {
173 pub ref_id: Option<DefId>,
174 pub decl_id: Option<DefId>,
179 impl<'l, 'tcx: 'l> SaveContext<'l, 'tcx> {
180 pub fn new(tcx: &'l ty::ctxt<'tcx>,
181 lcx: &'l lowering::LoweringContext<'l, 'tcx>)
182 -> SaveContext<'l, 'tcx> {
183 let span_utils = SpanUtils::new(&tcx.sess);
184 SaveContext::from_span_utils(tcx, lcx, span_utils)
187 pub fn from_span_utils(tcx: &'l ty::ctxt<'tcx>,
188 lcx: &'l lowering::LoweringContext<'l, 'tcx>,
189 span_utils: SpanUtils<'l>)
190 -> SaveContext<'l, 'tcx> {
194 span_utils: span_utils,
198 // List external crates used by the current crate.
199 pub fn get_external_crates(&self) -> Vec<CrateData> {
200 let mut result = Vec::new();
202 self.tcx.sess.cstore.iter_crate_data(|n, cmd| {
203 result.push(CrateData {
204 name: cmd.name.clone(),
212 pub fn get_item_data(&self, item: &ast::Item) -> Data {
215 let name = self.tcx.map.path_to_string(item.id);
216 let qualname = format!("::{}", name);
217 let sub_span = self.span_utils.sub_span_after_keyword(item.span, keywords::Fn);
219 Data::FunctionData(FunctionData {
224 span: sub_span.unwrap(),
225 scope: self.enclosing_scope(item.id),
228 ast::ItemStatic(ref typ, mt, ref expr) => {
229 let qualname = format!("::{}", self.tcx.map.path_to_string(item.id));
231 // If the variable is immutable, save the initialising expression.
232 let (value, keyword) = match mt {
233 ast::MutMutable => (String::from("<mutable>"), keywords::Mut),
234 ast::MutImmutable => (self.span_utils.snippet(expr.span), keywords::Static),
237 let sub_span = self.span_utils.sub_span_after_keyword(item.span, keyword);
239 Data::VariableData(VariableData {
241 name: item.ident.to_string(),
243 span: sub_span.unwrap(),
244 scope: self.enclosing_scope(item.id),
246 type_value: ty_to_string(&typ),
249 ast::ItemConst(ref typ, ref expr) => {
250 let qualname = format!("::{}", self.tcx.map.path_to_string(item.id));
251 let sub_span = self.span_utils.sub_span_after_keyword(item.span, keywords::Const);
253 Data::VariableData(VariableData {
255 name: item.ident.to_string(),
257 span: sub_span.unwrap(),
258 scope: self.enclosing_scope(item.id),
259 value: self.span_utils.snippet(expr.span),
260 type_value: ty_to_string(&typ),
263 ast::ItemMod(ref m) => {
264 let qualname = format!("::{}", self.tcx.map.path_to_string(item.id));
266 let cm = self.tcx.sess.codemap();
267 let filename = cm.span_to_filename(m.inner);
269 let sub_span = self.span_utils.sub_span_after_keyword(item.span, keywords::Mod);
271 Data::ModData(ModData {
273 name: item.ident.to_string(),
275 span: sub_span.unwrap(),
276 scope: self.enclosing_scope(item.id),
280 ast::ItemEnum(..) => {
281 let enum_name = format!("::{}", self.tcx.map.path_to_string(item.id));
282 let val = self.span_utils.snippet(item.span);
283 let sub_span = self.span_utils.sub_span_after_keyword(item.span, keywords::Enum);
285 Data::EnumData(EnumData {
288 span: sub_span.unwrap(),
290 scope: self.enclosing_scope(item.id),
293 ast::ItemImpl(_, _, _, ref trait_ref, ref typ, _) => {
294 let mut type_data = None;
297 let parent = self.enclosing_scope(item.id);
300 // Common case impl for a struct or something basic.
301 ast::TyPath(None, ref path) => {
302 sub_span = self.span_utils.sub_span_for_type_name(path.span).unwrap();
303 type_data = self.lookup_ref_id(typ.id).map(|id| {
312 // Less useful case, impl for a compound type.
314 sub_span = self.span_utils.sub_span_for_type_name(span).unwrap_or(span);
318 let trait_data = trait_ref.as_ref()
319 .and_then(|tr| self.get_trait_ref_data(tr, parent));
321 Data::ImplData(ImplData {
325 trait_ref: trait_data,
336 pub fn get_field_data(&self, field: &ast::StructField, scope: NodeId) -> Option<VariableData> {
337 match field.node.kind {
338 ast::NamedField(ident, _) => {
339 let qualname = format!("::{}::{}", self.tcx.map.path_to_string(scope), ident);
340 let typ = self.tcx.node_types().get(&field.node.id).unwrap().to_string();
341 let sub_span = self.span_utils.sub_span_before_token(field.span, token::Colon);
344 name: ident.to_string(),
346 span: sub_span.unwrap(),
348 value: "".to_owned(),
356 // FIXME would be nice to take a MethodItem here, but the ast provides both
357 // trait and impl flavours, so the caller must do the disassembly.
358 pub fn get_method_data(&self, id: ast::NodeId, name: ast::Name, span: Span) -> FunctionData {
359 // The qualname for a method is the trait name or name of the struct in an impl in
360 // which the method is declared in, followed by the method's name.
361 let qualname = match self.tcx.impl_of_method(self.tcx.map.local_def_id(id)) {
362 Some(impl_id) => match self.tcx.map.get_if_local(impl_id) {
363 Some(NodeItem(item)) => {
365 hir::ItemImpl(_, _, _, _, ref ty, _) => {
366 let mut result = String::from("<");
367 result.push_str(&rustc_front::print::pprust::ty_to_string(&**ty));
369 match self.tcx.trait_of_item(self.tcx.map.local_def_id(id)) {
371 result.push_str(" as ");
372 result.push_str(&self.tcx.item_path_str(def_id));
376 result.push_str(">");
380 self.tcx.sess.span_bug(span,
381 &format!("Container {:?} for method {} not \
389 self.tcx.sess.span_bug(span,
390 &format!("Container {:?} for method {} is not a node \
397 None => match self.tcx.trait_of_item(self.tcx.map.local_def_id(id)) {
399 match self.tcx.map.get_if_local(def_id) {
400 Some(NodeItem(_)) => {
401 format!("::{}", self.tcx.item_path_str(def_id))
404 self.tcx.sess.span_bug(span,
405 &format!("Could not find container {:?} for \
406 method {}, got {:?}",
414 self.tcx.sess.span_bug(span,
415 &format!("Could not find container for method {}", id));
420 let qualname = format!("{}::{}", qualname, name);
422 let def_id = self.tcx.map.local_def_id(id);
423 let decl_id = self.tcx.trait_item_of_item(def_id).and_then(|new_id| {
424 let new_def_id = new_id.def_id();
425 if new_def_id != def_id {
432 let sub_span = self.span_utils.sub_span_after_keyword(span, keywords::Fn);
436 name: name.to_string(),
438 declaration: decl_id,
439 span: sub_span.unwrap(),
440 scope: self.enclosing_scope(id),
444 pub fn get_trait_ref_data(&self,
445 trait_ref: &ast::TraitRef,
447 -> Option<TypeRefData> {
448 self.lookup_ref_id(trait_ref.ref_id).map(|def_id| {
449 let span = trait_ref.path.span;
450 let sub_span = self.span_utils.sub_span_for_type_name(span).unwrap_or(span);
459 pub fn get_expr_data(&self, expr: &ast::Expr) -> Option<Data> {
461 ast::ExprField(ref sub_ex, ident) => {
462 let hir_node = lowering::lower_expr(self.lcx, sub_ex);
463 let ty = &self.tcx.expr_ty_adjusted(&hir_node).sty;
465 ty::TyStruct(def, _) => {
466 let f = def.struct_variant().field_named(ident.node.name);
467 let sub_span = self.span_utils.span_for_last_ident(expr.span);
468 return Some(Data::VariableRefData(VariableRefData {
469 name: ident.node.to_string(),
470 span: sub_span.unwrap(),
471 scope: self.enclosing_scope(expr.id),
476 debug!("Expected struct type, found {:?}", ty);
481 ast::ExprStruct(ref path, _, _) => {
482 let hir_node = lowering::lower_expr(self.lcx, expr);
483 let ty = &self.tcx.expr_ty_adjusted(&hir_node).sty;
485 ty::TyStruct(def, _) => {
486 let sub_span = self.span_utils.span_for_last_ident(path.span);
487 Some(Data::TypeRefData(TypeRefData {
488 span: sub_span.unwrap(),
489 scope: self.enclosing_scope(expr.id),
494 // FIXME ty could legitimately be a TyEnum, but then we will fail
495 // later if we try to look up the fields.
496 debug!("expected TyStruct, found {:?}", ty);
501 ast::ExprMethodCall(..) => {
502 let method_call = ty::MethodCall::expr(expr.id);
503 let method_id = self.tcx.tables.borrow().method_map[&method_call].def_id;
504 let (def_id, decl_id) = match self.tcx.impl_or_trait_item(method_id).container() {
505 ty::ImplContainer(_) => (Some(method_id), None),
506 ty::TraitContainer(_) => (None, Some(method_id)),
508 let sub_span = self.span_utils.sub_span_for_meth_name(expr.span);
509 let parent = self.enclosing_scope(expr.id);
510 Some(Data::MethodCallData(MethodCallData {
511 span: sub_span.unwrap(),
517 ast::ExprPath(_, ref path) => {
518 self.get_path_data(expr.id, path)
527 pub fn get_path_data(&self, id: NodeId, path: &ast::Path) -> Option<Data> {
528 let def_map = self.tcx.def_map.borrow();
529 if !def_map.contains_key(&id) {
530 self.tcx.sess.span_bug(path.span,
531 &format!("def_map has no key for {} in visit_expr", id));
533 let def = def_map.get(&id).unwrap().full_def();
534 let sub_span = self.span_utils.span_for_last_ident(path.span);
540 def::DefAssociatedConst(..) |
541 def::DefVariant(..) => {
542 Some(Data::VariableRefData(VariableRefData {
543 name: self.span_utils.snippet(sub_span.unwrap()),
544 span: sub_span.unwrap(),
545 scope: self.enclosing_scope(id),
546 ref_id: def.def_id(),
549 def::DefStruct(def_id) |
550 def::DefTy(def_id, _) |
551 def::DefTrait(def_id) |
552 def::DefTyParam(_, _, def_id, _) => {
553 Some(Data::TypeRefData(TypeRefData {
554 span: sub_span.unwrap(),
556 scope: self.enclosing_scope(id),
559 def::DefMethod(decl_id) => {
560 let sub_span = self.span_utils.sub_span_for_meth_name(path.span);
561 let def_id = if decl_id.is_local() {
562 let ti = self.tcx.impl_or_trait_item(decl_id);
563 match ti.container() {
564 ty::TraitContainer(def_id) => {
568 .find(|mr| mr.name() == ti.name() && self.trait_method_has_body(mr))
569 .map(|mr| mr.def_id())
571 ty::ImplContainer(def_id) => {
572 let impl_items = self.tcx.impl_items.borrow();
573 Some(impl_items.get(&def_id)
577 self.tcx.impl_or_trait_item(mr.def_id()).name() ==
587 Some(Data::MethodCallData(MethodCallData {
588 span: sub_span.unwrap(),
589 scope: self.enclosing_scope(id),
591 decl_id: Some(decl_id),
594 def::DefFn(def_id, _) => {
595 Some(Data::FunctionCallData(FunctionCallData {
597 span: sub_span.unwrap(),
598 scope: self.enclosing_scope(id),
601 def::DefMod(def_id) => {
602 Some(Data::ModRefData(ModRefData {
604 span: sub_span.unwrap(),
605 scope: self.enclosing_scope(id),
612 fn trait_method_has_body(&self, mr: &ty::ImplOrTraitItem) -> bool {
613 let def_id = mr.def_id();
614 if let Some(node_id) = self.tcx.map.as_local_node_id(def_id) {
615 let trait_item = self.tcx.map.expect_trait_item(node_id);
616 if let hir::TraitItem_::MethodTraitItem(_, Some(_)) = trait_item.node {
626 pub fn get_field_ref_data(&self,
627 field_ref: &ast::Field,
628 variant: ty::VariantDef,
631 let f = variant.field_named(field_ref.ident.node.name);
632 // We don't really need a sub-span here, but no harm done
633 let sub_span = self.span_utils.span_for_last_ident(field_ref.ident.span);
635 name: field_ref.ident.node.to_string(),
636 span: sub_span.unwrap(),
642 pub fn get_data_for_id(&self, _id: &NodeId) -> Data {
647 fn lookup_ref_id(&self, ref_id: NodeId) -> Option<DefId> {
648 if !self.tcx.def_map.borrow().contains_key(&ref_id) {
649 self.tcx.sess.bug(&format!("def_map has no key for {} in lookup_type_ref",
652 let def = self.tcx.def_map.borrow().get(&ref_id).unwrap().full_def();
654 def::DefPrimTy(_) | def::DefSelfTy(..) => None,
655 _ => Some(def.def_id()),
660 pub fn enclosing_scope(&self, id: NodeId) -> NodeId {
661 self.tcx.map.get_enclosing_scope(id).unwrap_or(0)
665 // An AST visitor for collecting paths from patterns.
666 struct PathCollector {
667 // The Row field identifies the kind of pattern.
668 collected_paths: Vec<(NodeId, ast::Path, ast::Mutability, recorder::Row)>,
672 fn new() -> PathCollector {
673 PathCollector { collected_paths: vec![] }
677 impl<'v> Visitor<'v> for PathCollector {
678 fn visit_pat(&mut self, p: &ast::Pat) {
679 if generated_code(p.span) {
684 ast::PatStruct(ref path, _, _) => {
685 self.collected_paths.push((p.id, path.clone(), ast::MutMutable, recorder::TypeRef));
687 ast::PatEnum(ref path, _) |
688 ast::PatQPath(_, ref path) => {
689 self.collected_paths.push((p.id, path.clone(), ast::MutMutable, recorder::VarRef));
691 ast::PatIdent(bm, ref path1, _) => {
692 debug!("PathCollector, visit ident in pat {}: {:?} {:?}",
696 let immut = match bm {
697 // Even if the ref is mut, you can't change the ref, only
698 // the data pointed at, so showing the initialising expression
699 // is still worthwhile.
700 ast::BindByRef(_) => ast::MutImmutable,
701 ast::BindByValue(mt) => mt,
703 // collect path for either visit_local or visit_arm
704 let path = ast_util::ident_to_path(path1.span, path1.node);
705 self.collected_paths.push((p.id, path, immut, recorder::VarRef));
709 visit::walk_pat(self, p);
713 pub fn process_crate<'l, 'tcx>(tcx: &'l ty::ctxt<'tcx>,
714 lcx: &'l lowering::LoweringContext<'l, 'tcx>,
716 analysis: &ty::CrateAnalysis,
717 odir: Option<&Path>) {
718 if generated_code(krate.span) {
722 assert!(analysis.glob_map.is_some());
723 let cratename = match attr::find_crate_name(&krate.attrs) {
724 Some(name) => name.to_string(),
726 info!("Could not find crate name, using 'unknown_crate'");
727 String::from("unknown_crate")
731 info!("Dumping crate {}", cratename);
733 // find a path to dump our data to
734 let mut root_path = match env::var_os("DXR_RUST_TEMP_FOLDER") {
735 Some(val) => PathBuf::from(val),
737 Some(val) => val.join("dxr"),
738 None => PathBuf::from("dxr-temp"),
742 if let Err(e) = fs::create_dir_all(&root_path) {
743 tcx.sess.err(&format!("Could not create directory {}: {}",
749 let disp = root_path.display();
750 info!("Writing output to {}", disp);
753 // Create output file.
754 let mut out_name = cratename.clone();
755 out_name.push_str(".csv");
756 root_path.push(&out_name);
757 let output_file = match File::create(&root_path) {
760 let disp = root_path.display();
761 tcx.sess.fatal(&format!("Could not open {}: {}", disp, e));
766 let mut visitor = dump_csv::DumpCsvVisitor::new(tcx, lcx, analysis, output_file);
768 visitor.dump_crate_info(&cratename, krate);
769 visit::walk_crate(&mut visitor, krate);
772 // Utility functions for the module.
774 // Helper function to escape quotes in a string
775 fn escape(s: String) -> String {
776 s.replace("\"", "\"\"")
779 // If the expression is a macro expansion or other generated code, run screaming
781 pub fn generated_code(span: Span) -> bool {
782 span.expn_id != NO_EXPANSION || span == DUMMY_SP