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d9579d0f | 1 | // Copyright 2015 The Rust Project Developers. See the COPYRIGHT |
1a4d82fc JJ |
2 | // file at the top-level directory of this distribution and at |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
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. | |
10 | ||
d9579d0f | 11 | use self::RecursiveTypeDescription::*; |
1a4d82fc JJ |
12 | use self::MemberOffset::*; |
13 | use self::MemberDescriptionFactory::*; | |
1a4d82fc | 14 | use self::EnumDiscriminantInfo::*; |
1a4d82fc | 15 | |
d9579d0f AL |
16 | use super::utils::{debug_context, DIB, span_start, bytes_to_bits, size_and_align_of, |
17 | get_namespace_and_span_for_item, create_DIArray, | |
18 | fn_should_be_ignored, is_node_local_to_unit}; | |
a7813a04 | 19 | use super::namespace::mangled_name_of_item; |
d9579d0f | 20 | use super::type_names::{compute_debuginfo_type_name, push_debuginfo_type_name}; |
5bcae85e SL |
21 | use super::{declare_local, VariableKind, VariableAccess, CrateDebugContext}; |
22 | use context::SharedCrateContext; | |
23 | use session::Session; | |
d9579d0f AL |
24 | |
25 | use llvm::{self, ValueRef}; | |
26 | use llvm::debuginfo::{DIType, DIFile, DIScope, DIDescriptor, DICompositeType}; | |
27 | ||
54a0048b | 28 | use rustc::hir::def_id::DefId; |
54a0048b SL |
29 | use rustc::hir::pat_util; |
30 | use rustc::ty::subst; | |
31 | use rustc::hir::map as hir_map; | |
32 | use rustc::hir::{self, PatKind}; | |
33 | use {type_of, adt, machine, monomorphize}; | |
34 | use common::{self, CrateContext, FunctionContext, Block}; | |
35 | use _match::{BindingInfo, TransBindingMode}; | |
36 | use type_::Type; | |
37 | use rustc::ty::{self, Ty}; | |
d9579d0f AL |
38 | use session::config::{self, FullDebugInfo}; |
39 | use util::nodemap::FnvHashMap; | |
c34b1796 | 40 | use util::common::path2cstr; |
1a4d82fc | 41 | |
85aaf69f | 42 | use libc::{c_uint, c_longlong}; |
c34b1796 AL |
43 | use std::ffi::CString; |
44 | use std::path::Path; | |
1a4d82fc | 45 | use std::ptr; |
d9579d0f | 46 | use std::rc::Rc; |
b039eaaf | 47 | use syntax; |
1a4d82fc | 48 | use syntax::util::interner::Interner; |
3157f602 | 49 | use syntax::ast; |
e9174d1e | 50 | use syntax::parse::token; |
3157f602 | 51 | use syntax_pos::{self, Span}; |
1a4d82fc | 52 | |
54a0048b SL |
53 | // From DWARF 5. |
54 | // See http://www.dwarfstd.org/ShowIssue.php?issue=140129.1 | |
55 | const DW_LANG_RUST: c_uint = 0x1c; | |
1a4d82fc JJ |
56 | #[allow(non_upper_case_globals)] |
57 | const DW_ATE_boolean: c_uint = 0x02; | |
58 | #[allow(non_upper_case_globals)] | |
59 | const DW_ATE_float: c_uint = 0x04; | |
60 | #[allow(non_upper_case_globals)] | |
61 | const DW_ATE_signed: c_uint = 0x05; | |
62 | #[allow(non_upper_case_globals)] | |
63 | const DW_ATE_unsigned: c_uint = 0x07; | |
64 | #[allow(non_upper_case_globals)] | |
65 | const DW_ATE_unsigned_char: c_uint = 0x08; | |
66 | ||
d9579d0f AL |
67 | pub const UNKNOWN_LINE_NUMBER: c_uint = 0; |
68 | pub const UNKNOWN_COLUMN_NUMBER: c_uint = 0; | |
1a4d82fc JJ |
69 | |
70 | // ptr::null() doesn't work :( | |
a7813a04 | 71 | pub const NO_SCOPE_METADATA: DIScope = (0 as DIScope); |
1a4d82fc JJ |
72 | |
73 | const FLAGS_NONE: c_uint = 0; | |
74 | ||
85aaf69f | 75 | #[derive(Copy, Debug, Hash, Eq, PartialEq, Clone)] |
d9579d0f | 76 | pub struct UniqueTypeId(ast::Name); |
1a4d82fc JJ |
77 | |
78 | // The TypeMap is where the CrateDebugContext holds the type metadata nodes | |
79 | // created so far. The metadata nodes are indexed by UniqueTypeId, and, for | |
80 | // faster lookup, also by Ty. The TypeMap is responsible for creating | |
81 | // UniqueTypeIds. | |
d9579d0f | 82 | pub struct TypeMap<'tcx> { |
1a4d82fc | 83 | // The UniqueTypeIds created so far |
5bcae85e | 84 | unique_id_interner: Interner, |
1a4d82fc JJ |
85 | // A map from UniqueTypeId to debuginfo metadata for that type. This is a 1:1 mapping. |
86 | unique_id_to_metadata: FnvHashMap<UniqueTypeId, DIType>, | |
87 | // A map from types to debuginfo metadata. This is a N:1 mapping. | |
88 | type_to_metadata: FnvHashMap<Ty<'tcx>, DIType>, | |
89 | // A map from types to UniqueTypeId. This is a N:1 mapping. | |
90 | type_to_unique_id: FnvHashMap<Ty<'tcx>, UniqueTypeId> | |
91 | } | |
92 | ||
93 | impl<'tcx> TypeMap<'tcx> { | |
d9579d0f | 94 | pub fn new() -> TypeMap<'tcx> { |
1a4d82fc JJ |
95 | TypeMap { |
96 | unique_id_interner: Interner::new(), | |
85aaf69f SL |
97 | type_to_metadata: FnvHashMap(), |
98 | unique_id_to_metadata: FnvHashMap(), | |
99 | type_to_unique_id: FnvHashMap(), | |
1a4d82fc JJ |
100 | } |
101 | } | |
102 | ||
103 | // Adds a Ty to metadata mapping to the TypeMap. The method will fail if | |
104 | // the mapping already exists. | |
105 | fn register_type_with_metadata<'a>(&mut self, | |
1a4d82fc JJ |
106 | type_: Ty<'tcx>, |
107 | metadata: DIType) { | |
108 | if self.type_to_metadata.insert(type_, metadata).is_some() { | |
54a0048b | 109 | bug!("Type metadata for Ty '{}' is already in the TypeMap!", type_); |
1a4d82fc JJ |
110 | } |
111 | } | |
112 | ||
113 | // Adds a UniqueTypeId to metadata mapping to the TypeMap. The method will | |
114 | // fail if the mapping already exists. | |
115 | fn register_unique_id_with_metadata(&mut self, | |
1a4d82fc JJ |
116 | unique_type_id: UniqueTypeId, |
117 | metadata: DIType) { | |
118 | if self.unique_id_to_metadata.insert(unique_type_id, metadata).is_some() { | |
119 | let unique_type_id_str = self.get_unique_type_id_as_string(unique_type_id); | |
54a0048b SL |
120 | bug!("Type metadata for unique id '{}' is already in the TypeMap!", |
121 | &unique_type_id_str[..]); | |
1a4d82fc JJ |
122 | } |
123 | } | |
124 | ||
125 | fn find_metadata_for_type(&self, type_: Ty<'tcx>) -> Option<DIType> { | |
126 | self.type_to_metadata.get(&type_).cloned() | |
127 | } | |
128 | ||
129 | fn find_metadata_for_unique_id(&self, unique_type_id: UniqueTypeId) -> Option<DIType> { | |
130 | self.unique_id_to_metadata.get(&unique_type_id).cloned() | |
131 | } | |
132 | ||
133 | // Get the string representation of a UniqueTypeId. This method will fail if | |
134 | // the id is unknown. | |
135 | fn get_unique_type_id_as_string(&self, unique_type_id: UniqueTypeId) -> Rc<String> { | |
136 | let UniqueTypeId(interner_key) = unique_type_id; | |
137 | self.unique_id_interner.get(interner_key) | |
138 | } | |
139 | ||
140 | // Get the UniqueTypeId for the given type. If the UniqueTypeId for the given | |
141 | // type has been requested before, this is just a table lookup. Otherwise an | |
142 | // ID will be generated and stored for later lookup. | |
143 | fn get_unique_type_id_of_type<'a>(&mut self, cx: &CrateContext<'a, 'tcx>, | |
144 | type_: Ty<'tcx>) -> UniqueTypeId { | |
145 | ||
d9579d0f AL |
146 | // basic type -> {:name of the type:} |
147 | // tuple -> {tuple_(:param-uid:)*} | |
148 | // struct -> {struct_:svh: / :node-id:_<(:param-uid:),*> } | |
149 | // enum -> {enum_:svh: / :node-id:_<(:param-uid:),*> } | |
150 | // enum variant -> {variant_:variant-name:_:enum-uid:} | |
151 | // reference (&) -> {& :pointee-uid:} | |
152 | // mut reference (&mut) -> {&mut :pointee-uid:} | |
153 | // ptr (*) -> {* :pointee-uid:} | |
154 | // mut ptr (*mut) -> {*mut :pointee-uid:} | |
155 | // unique ptr (box) -> {box :pointee-uid:} | |
156 | // @-ptr (@) -> {@ :pointee-uid:} | |
157 | // sized vec ([T; x]) -> {[:size:] :element-uid:} | |
158 | // unsized vec ([T]) -> {[] :element-uid:} | |
159 | // trait (T) -> {trait_:svh: / :node-id:_<(:param-uid:),*> } | |
160 | // closure -> {<unsafe_> <once_> :store-sigil: |(:param-uid:),* <,_...>| -> \ | |
1a4d82fc | 161 | // :return-type-uid: : (:bounds:)*} |
d9579d0f | 162 | // function -> {<unsafe_> <abi_> fn( (:param-uid:)* <,_...> ) -> \ |
1a4d82fc | 163 | // :return-type-uid:} |
1a4d82fc JJ |
164 | |
165 | match self.type_to_unique_id.get(&type_).cloned() { | |
166 | Some(unique_type_id) => return unique_type_id, | |
167 | None => { /* generate one */} | |
168 | }; | |
169 | ||
170 | let mut unique_type_id = String::with_capacity(256); | |
171 | unique_type_id.push('{'); | |
172 | ||
173 | match type_.sty { | |
5bcae85e | 174 | ty::TyNever | |
62682a34 SL |
175 | ty::TyBool | |
176 | ty::TyChar | | |
177 | ty::TyStr | | |
178 | ty::TyInt(_) | | |
179 | ty::TyUint(_) | | |
180 | ty::TyFloat(_) => { | |
1a4d82fc JJ |
181 | push_debuginfo_type_name(cx, type_, false, &mut unique_type_id); |
182 | }, | |
e9174d1e | 183 | ty::TyEnum(def, substs) => { |
1a4d82fc | 184 | unique_type_id.push_str("enum "); |
e9174d1e | 185 | from_def_id_and_substs(self, cx, def.did, substs, &mut unique_type_id); |
1a4d82fc | 186 | }, |
e9174d1e | 187 | ty::TyStruct(def, substs) => { |
1a4d82fc | 188 | unique_type_id.push_str("struct "); |
e9174d1e | 189 | from_def_id_and_substs(self, cx, def.did, substs, &mut unique_type_id); |
1a4d82fc | 190 | }, |
a7813a04 | 191 | ty::TyTuple(component_types) if component_types.is_empty() => { |
1a4d82fc JJ |
192 | push_debuginfo_type_name(cx, type_, false, &mut unique_type_id); |
193 | }, | |
a7813a04 | 194 | ty::TyTuple(component_types) => { |
1a4d82fc | 195 | unique_type_id.push_str("tuple "); |
85aaf69f | 196 | for &component_type in component_types { |
1a4d82fc JJ |
197 | let component_type_id = |
198 | self.get_unique_type_id_of_type(cx, component_type); | |
199 | let component_type_id = | |
200 | self.get_unique_type_id_as_string(component_type_id); | |
85aaf69f | 201 | unique_type_id.push_str(&component_type_id[..]); |
1a4d82fc JJ |
202 | } |
203 | }, | |
62682a34 | 204 | ty::TyBox(inner_type) => { |
d9579d0f | 205 | unique_type_id.push_str("box "); |
1a4d82fc JJ |
206 | let inner_type_id = self.get_unique_type_id_of_type(cx, inner_type); |
207 | let inner_type_id = self.get_unique_type_id_as_string(inner_type_id); | |
85aaf69f | 208 | unique_type_id.push_str(&inner_type_id[..]); |
1a4d82fc | 209 | }, |
c1a9b12d | 210 | ty::TyRawPtr(ty::TypeAndMut { ty: inner_type, mutbl } ) => { |
1a4d82fc | 211 | unique_type_id.push('*'); |
e9174d1e | 212 | if mutbl == hir::MutMutable { |
1a4d82fc JJ |
213 | unique_type_id.push_str("mut"); |
214 | } | |
215 | ||
216 | let inner_type_id = self.get_unique_type_id_of_type(cx, inner_type); | |
217 | let inner_type_id = self.get_unique_type_id_as_string(inner_type_id); | |
85aaf69f | 218 | unique_type_id.push_str(&inner_type_id[..]); |
1a4d82fc | 219 | }, |
c1a9b12d | 220 | ty::TyRef(_, ty::TypeAndMut { ty: inner_type, mutbl }) => { |
1a4d82fc | 221 | unique_type_id.push('&'); |
e9174d1e | 222 | if mutbl == hir::MutMutable { |
1a4d82fc JJ |
223 | unique_type_id.push_str("mut"); |
224 | } | |
225 | ||
226 | let inner_type_id = self.get_unique_type_id_of_type(cx, inner_type); | |
227 | let inner_type_id = self.get_unique_type_id_as_string(inner_type_id); | |
85aaf69f | 228 | unique_type_id.push_str(&inner_type_id[..]); |
1a4d82fc | 229 | }, |
62682a34 SL |
230 | ty::TyArray(inner_type, len) => { |
231 | unique_type_id.push_str(&format!("[{}]", len)); | |
232 | ||
233 | let inner_type_id = self.get_unique_type_id_of_type(cx, inner_type); | |
234 | let inner_type_id = self.get_unique_type_id_as_string(inner_type_id); | |
235 | unique_type_id.push_str(&inner_type_id[..]); | |
236 | }, | |
237 | ty::TySlice(inner_type) => { | |
238 | unique_type_id.push_str("[]"); | |
1a4d82fc JJ |
239 | |
240 | let inner_type_id = self.get_unique_type_id_of_type(cx, inner_type); | |
241 | let inner_type_id = self.get_unique_type_id_as_string(inner_type_id); | |
85aaf69f | 242 | unique_type_id.push_str(&inner_type_id[..]); |
1a4d82fc | 243 | }, |
62682a34 | 244 | ty::TyTrait(ref trait_data) => { |
1a4d82fc JJ |
245 | unique_type_id.push_str("trait "); |
246 | ||
c1a9b12d | 247 | let principal = cx.tcx().erase_late_bound_regions(&trait_data.principal); |
1a4d82fc JJ |
248 | |
249 | from_def_id_and_substs(self, | |
250 | cx, | |
251 | principal.def_id, | |
252 | principal.substs, | |
253 | &mut unique_type_id); | |
254 | }, | |
54a0048b SL |
255 | ty::TyFnDef(_, _, &ty::BareFnTy{ unsafety, abi, ref sig } ) | |
256 | ty::TyFnPtr(&ty::BareFnTy{ unsafety, abi, ref sig } ) => { | |
e9174d1e | 257 | if unsafety == hir::Unsafety::Unsafe { |
1a4d82fc JJ |
258 | unique_type_id.push_str("unsafe "); |
259 | } | |
260 | ||
261 | unique_type_id.push_str(abi.name()); | |
262 | ||
263 | unique_type_id.push_str(" fn("); | |
264 | ||
c1a9b12d | 265 | let sig = cx.tcx().erase_late_bound_regions(sig); |
a7813a04 | 266 | let sig = cx.tcx().normalize_associated_type(&sig); |
1a4d82fc | 267 | |
85aaf69f | 268 | for ¶meter_type in &sig.inputs { |
1a4d82fc JJ |
269 | let parameter_type_id = |
270 | self.get_unique_type_id_of_type(cx, parameter_type); | |
271 | let parameter_type_id = | |
272 | self.get_unique_type_id_as_string(parameter_type_id); | |
85aaf69f | 273 | unique_type_id.push_str(¶meter_type_id[..]); |
1a4d82fc JJ |
274 | unique_type_id.push(','); |
275 | } | |
276 | ||
277 | if sig.variadic { | |
278 | unique_type_id.push_str("..."); | |
279 | } | |
280 | ||
281 | unique_type_id.push_str(")->"); | |
5bcae85e SL |
282 | let return_type_id = self.get_unique_type_id_of_type(cx, sig.output); |
283 | let return_type_id = self.get_unique_type_id_as_string(return_type_id); | |
284 | unique_type_id.push_str(&return_type_id[..]); | |
1a4d82fc | 285 | }, |
a7813a04 | 286 | ty::TyClosure(_, substs) if substs.upvar_tys.is_empty() => { |
c1a9b12d SL |
287 | push_debuginfo_type_name(cx, type_, false, &mut unique_type_id); |
288 | }, | |
a7813a04 | 289 | ty::TyClosure(_, substs) => { |
c1a9b12d | 290 | unique_type_id.push_str("closure "); |
a7813a04 | 291 | for upvar_type in substs.upvar_tys { |
c1a9b12d SL |
292 | let upvar_type_id = |
293 | self.get_unique_type_id_of_type(cx, upvar_type); | |
294 | let upvar_type_id = | |
295 | self.get_unique_type_id_as_string(upvar_type_id); | |
296 | unique_type_id.push_str(&upvar_type_id[..]); | |
297 | } | |
1a4d82fc JJ |
298 | }, |
299 | _ => { | |
54a0048b SL |
300 | bug!("get_unique_type_id_of_type() - unexpected type: {:?}", |
301 | type_) | |
1a4d82fc JJ |
302 | } |
303 | }; | |
304 | ||
305 | unique_type_id.push('}'); | |
306 | ||
307 | // Trim to size before storing permanently | |
308 | unique_type_id.shrink_to_fit(); | |
309 | ||
5bcae85e | 310 | let key = self.unique_id_interner.intern(unique_type_id); |
1a4d82fc JJ |
311 | self.type_to_unique_id.insert(type_, UniqueTypeId(key)); |
312 | ||
313 | return UniqueTypeId(key); | |
314 | ||
315 | fn from_def_id_and_substs<'a, 'tcx>(type_map: &mut TypeMap<'tcx>, | |
316 | cx: &CrateContext<'a, 'tcx>, | |
e9174d1e | 317 | def_id: DefId, |
1a4d82fc JJ |
318 | substs: &subst::Substs<'tcx>, |
319 | output: &mut String) { | |
320 | // First, find out the 'real' def_id of the type. Items inlined from | |
321 | // other crates have to be mapped back to their source. | |
54a0048b | 322 | let def_id = if let Some(node_id) = cx.tcx().map.as_local_node_id(def_id) { |
5bcae85e SL |
323 | if cx.tcx().map.is_inlined_node_id(node_id) { |
324 | // The given def_id identifies the inlined copy of a | |
325 | // type definition, let's take the source of the copy. | |
326 | cx.defid_for_inlined_node(node_id).unwrap() | |
327 | } else { | |
328 | def_id | |
1a4d82fc JJ |
329 | } |
330 | } else { | |
331 | def_id | |
332 | }; | |
333 | ||
54a0048b SL |
334 | // Get the crate name/disambiguator as first part of the identifier. |
335 | let crate_name = if def_id.is_local() { | |
336 | cx.tcx().crate_name.clone() | |
1a4d82fc | 337 | } else { |
54a0048b | 338 | cx.sess().cstore.original_crate_name(def_id.krate) |
1a4d82fc | 339 | }; |
54a0048b | 340 | let crate_disambiguator = cx.tcx().crate_disambiguator(def_id.krate); |
1a4d82fc | 341 | |
54a0048b | 342 | output.push_str(&crate_name[..]); |
1a4d82fc | 343 | output.push_str("/"); |
54a0048b SL |
344 | output.push_str(&crate_disambiguator[..]); |
345 | output.push_str("/"); | |
346 | // Add the def-index as the second part | |
b039eaaf | 347 | output.push_str(&format!("{:x}", def_id.index.as_usize())); |
1a4d82fc | 348 | |
1a4d82fc | 349 | let tps = substs.types.get_slice(subst::TypeSpace); |
9346a6ac | 350 | if !tps.is_empty() { |
1a4d82fc JJ |
351 | output.push('<'); |
352 | ||
85aaf69f | 353 | for &type_parameter in tps { |
1a4d82fc JJ |
354 | let param_type_id = |
355 | type_map.get_unique_type_id_of_type(cx, type_parameter); | |
356 | let param_type_id = | |
357 | type_map.get_unique_type_id_as_string(param_type_id); | |
85aaf69f | 358 | output.push_str(¶m_type_id[..]); |
1a4d82fc JJ |
359 | output.push(','); |
360 | } | |
361 | ||
362 | output.push('>'); | |
363 | } | |
364 | } | |
365 | } | |
366 | ||
1a4d82fc JJ |
367 | // Get the UniqueTypeId for an enum variant. Enum variants are not really |
368 | // types of their own, so they need special handling. We still need a | |
369 | // UniqueTypeId for them, since to debuginfo they *are* real types. | |
370 | fn get_unique_type_id_of_enum_variant<'a>(&mut self, | |
371 | cx: &CrateContext<'a, 'tcx>, | |
372 | enum_type: Ty<'tcx>, | |
373 | variant_name: &str) | |
374 | -> UniqueTypeId { | |
375 | let enum_type_id = self.get_unique_type_id_of_type(cx, enum_type); | |
376 | let enum_variant_type_id = format!("{}::{}", | |
c34b1796 | 377 | &self.get_unique_type_id_as_string(enum_type_id), |
1a4d82fc | 378 | variant_name); |
5bcae85e | 379 | let interner_key = self.unique_id_interner.intern(enum_variant_type_id); |
1a4d82fc JJ |
380 | UniqueTypeId(interner_key) |
381 | } | |
382 | } | |
383 | ||
d9579d0f AL |
384 | // A description of some recursive type. It can either be already finished (as |
385 | // with FinalMetadata) or it is not yet finished, but contains all information | |
386 | // needed to generate the missing parts of the description. See the | |
387 | // documentation section on Recursive Types at the top of this file for more | |
388 | // information. | |
389 | enum RecursiveTypeDescription<'tcx> { | |
390 | UnfinishedMetadata { | |
391 | unfinished_type: Ty<'tcx>, | |
392 | unique_type_id: UniqueTypeId, | |
393 | metadata_stub: DICompositeType, | |
394 | llvm_type: Type, | |
395 | member_description_factory: MemberDescriptionFactory<'tcx>, | |
396 | }, | |
397 | FinalMetadata(DICompositeType) | |
398 | } | |
399 | ||
400 | fn create_and_register_recursive_type_forward_declaration<'a, 'tcx>( | |
401 | cx: &CrateContext<'a, 'tcx>, | |
402 | unfinished_type: Ty<'tcx>, | |
403 | unique_type_id: UniqueTypeId, | |
404 | metadata_stub: DICompositeType, | |
405 | llvm_type: Type, | |
406 | member_description_factory: MemberDescriptionFactory<'tcx>) | |
407 | -> RecursiveTypeDescription<'tcx> { | |
408 | ||
409 | // Insert the stub into the TypeMap in order to allow for recursive references | |
410 | let mut type_map = debug_context(cx).type_map.borrow_mut(); | |
54a0048b SL |
411 | type_map.register_unique_id_with_metadata(unique_type_id, metadata_stub); |
412 | type_map.register_type_with_metadata(unfinished_type, metadata_stub); | |
d9579d0f AL |
413 | |
414 | UnfinishedMetadata { | |
415 | unfinished_type: unfinished_type, | |
416 | unique_type_id: unique_type_id, | |
417 | metadata_stub: metadata_stub, | |
418 | llvm_type: llvm_type, | |
419 | member_description_factory: member_description_factory, | |
420 | } | |
421 | } | |
422 | ||
423 | impl<'tcx> RecursiveTypeDescription<'tcx> { | |
424 | // Finishes up the description of the type in question (mostly by providing | |
425 | // descriptions of the fields of the given type) and returns the final type | |
426 | // metadata. | |
427 | fn finalize<'a>(&self, cx: &CrateContext<'a, 'tcx>) -> MetadataCreationResult { | |
428 | match *self { | |
429 | FinalMetadata(metadata) => MetadataCreationResult::new(metadata, false), | |
430 | UnfinishedMetadata { | |
431 | unfinished_type, | |
432 | unique_type_id, | |
433 | metadata_stub, | |
434 | llvm_type, | |
435 | ref member_description_factory, | |
436 | .. | |
437 | } => { | |
438 | // Make sure that we have a forward declaration of the type in | |
439 | // the TypeMap so that recursive references are possible. This | |
440 | // will always be the case if the RecursiveTypeDescription has | |
441 | // been properly created through the | |
442 | // create_and_register_recursive_type_forward_declaration() | |
443 | // function. | |
444 | { | |
445 | let type_map = debug_context(cx).type_map.borrow(); | |
446 | if type_map.find_metadata_for_unique_id(unique_type_id).is_none() || | |
447 | type_map.find_metadata_for_type(unfinished_type).is_none() { | |
54a0048b SL |
448 | bug!("Forward declaration of potentially recursive type \ |
449 | '{:?}' was not found in TypeMap!", | |
450 | unfinished_type); | |
d9579d0f AL |
451 | } |
452 | } | |
453 | ||
454 | // ... then create the member descriptions ... | |
455 | let member_descriptions = | |
456 | member_description_factory.create_member_descriptions(cx); | |
457 | ||
458 | // ... and attach them to the stub to complete it. | |
459 | set_members_of_composite_type(cx, | |
460 | metadata_stub, | |
461 | llvm_type, | |
462 | &member_descriptions[..]); | |
463 | return MetadataCreationResult::new(metadata_stub, true); | |
464 | } | |
465 | } | |
466 | } | |
467 | } | |
468 | ||
1a4d82fc JJ |
469 | // Returns from the enclosing function if the type metadata with the given |
470 | // unique id can be found in the type map | |
471 | macro_rules! return_if_metadata_created_in_meantime { | |
472 | ($cx: expr, $unique_type_id: expr) => ( | |
473 | match debug_context($cx).type_map | |
474 | .borrow() | |
475 | .find_metadata_for_unique_id($unique_type_id) { | |
476 | Some(metadata) => return MetadataCreationResult::new(metadata, true), | |
477 | None => { /* proceed normally */ } | |
b039eaaf | 478 | } |
1a4d82fc JJ |
479 | ) |
480 | } | |
481 | ||
d9579d0f AL |
482 | fn fixed_vec_metadata<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, |
483 | unique_type_id: UniqueTypeId, | |
484 | element_type: Ty<'tcx>, | |
485 | len: Option<u64>, | |
486 | span: Span) | |
487 | -> MetadataCreationResult { | |
488 | let element_type_metadata = type_metadata(cx, element_type, span); | |
489 | ||
490 | return_if_metadata_created_in_meantime!(cx, unique_type_id); | |
1a4d82fc | 491 | |
d9579d0f AL |
492 | let element_llvm_type = type_of::type_of(cx, element_type); |
493 | let (element_type_size, element_type_align) = size_and_align_of(cx, element_llvm_type); | |
1a4d82fc | 494 | |
d9579d0f AL |
495 | let (array_size_in_bytes, upper_bound) = match len { |
496 | Some(len) => (element_type_size * len, len as c_longlong), | |
497 | None => (0, -1) | |
498 | }; | |
1a4d82fc | 499 | |
d9579d0f | 500 | let subrange = unsafe { |
5bcae85e | 501 | llvm::LLVMRustDIBuilderGetOrCreateSubrange(DIB(cx), 0, upper_bound) |
d9579d0f | 502 | }; |
1a4d82fc | 503 | |
d9579d0f AL |
504 | let subscripts = create_DIArray(DIB(cx), &[subrange]); |
505 | let metadata = unsafe { | |
5bcae85e | 506 | llvm::LLVMRustDIBuilderCreateArrayType( |
d9579d0f AL |
507 | DIB(cx), |
508 | bytes_to_bits(array_size_in_bytes), | |
509 | bytes_to_bits(element_type_align), | |
510 | element_type_metadata, | |
511 | subscripts) | |
512 | }; | |
1a4d82fc | 513 | |
d9579d0f | 514 | return MetadataCreationResult::new(metadata, false); |
1a4d82fc JJ |
515 | } |
516 | ||
d9579d0f AL |
517 | fn vec_slice_metadata<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, |
518 | vec_type: Ty<'tcx>, | |
519 | element_type: Ty<'tcx>, | |
520 | unique_type_id: UniqueTypeId, | |
521 | span: Span) | |
522 | -> MetadataCreationResult { | |
c1a9b12d | 523 | let data_ptr_type = cx.tcx().mk_ptr(ty::TypeAndMut { |
d9579d0f | 524 | ty: element_type, |
e9174d1e | 525 | mutbl: hir::MutImmutable |
d9579d0f | 526 | }); |
1a4d82fc | 527 | |
d9579d0f | 528 | let element_type_metadata = type_metadata(cx, data_ptr_type, span); |
1a4d82fc | 529 | |
d9579d0f | 530 | return_if_metadata_created_in_meantime!(cx, unique_type_id); |
1a4d82fc | 531 | |
d9579d0f AL |
532 | let slice_llvm_type = type_of::type_of(cx, vec_type); |
533 | let slice_type_name = compute_debuginfo_type_name(cx, vec_type, true); | |
1a4d82fc | 534 | |
d9579d0f AL |
535 | let member_llvm_types = slice_llvm_type.field_types(); |
536 | assert!(slice_layout_is_correct(cx, | |
537 | &member_llvm_types[..], | |
538 | element_type)); | |
539 | let member_descriptions = [ | |
540 | MemberDescription { | |
541 | name: "data_ptr".to_string(), | |
542 | llvm_type: member_llvm_types[0], | |
543 | type_metadata: element_type_metadata, | |
544 | offset: ComputedMemberOffset, | |
545 | flags: FLAGS_NONE | |
546 | }, | |
547 | MemberDescription { | |
548 | name: "length".to_string(), | |
549 | llvm_type: member_llvm_types[1], | |
550 | type_metadata: type_metadata(cx, cx.tcx().types.usize, span), | |
551 | offset: ComputedMemberOffset, | |
552 | flags: FLAGS_NONE | |
553 | }, | |
554 | ]; | |
1a4d82fc | 555 | |
d9579d0f | 556 | assert!(member_descriptions.len() == member_llvm_types.len()); |
1a4d82fc | 557 | |
d9579d0f | 558 | let loc = span_start(cx, span); |
3157f602 | 559 | let file_metadata = file_metadata(cx, &loc.file.name, &loc.file.abs_path); |
1a4d82fc | 560 | |
d9579d0f AL |
561 | let metadata = composite_type_metadata(cx, |
562 | slice_llvm_type, | |
563 | &slice_type_name[..], | |
564 | unique_type_id, | |
565 | &member_descriptions, | |
e9174d1e | 566 | NO_SCOPE_METADATA, |
d9579d0f AL |
567 | file_metadata, |
568 | span); | |
569 | return MetadataCreationResult::new(metadata, false); | |
1a4d82fc | 570 | |
d9579d0f AL |
571 | fn slice_layout_is_correct<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, |
572 | member_llvm_types: &[Type], | |
573 | element_type: Ty<'tcx>) | |
574 | -> bool { | |
575 | member_llvm_types.len() == 2 && | |
576 | member_llvm_types[0] == type_of::type_of(cx, element_type).ptr_to() && | |
577 | member_llvm_types[1] == cx.int_type() | |
1a4d82fc | 578 | } |
d9579d0f | 579 | } |
1a4d82fc | 580 | |
d9579d0f AL |
581 | fn subroutine_type_metadata<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, |
582 | unique_type_id: UniqueTypeId, | |
583 | signature: &ty::PolyFnSig<'tcx>, | |
584 | span: Span) | |
585 | -> MetadataCreationResult | |
586 | { | |
c1a9b12d | 587 | let signature = cx.tcx().erase_late_bound_regions(signature); |
1a4d82fc | 588 | |
d9579d0f | 589 | let mut signature_metadata: Vec<DIType> = Vec::with_capacity(signature.inputs.len() + 1); |
1a4d82fc | 590 | |
d9579d0f | 591 | // return type |
5bcae85e SL |
592 | signature_metadata.push(match signature.output.sty { |
593 | ty::TyTuple(ref tys) if tys.is_empty() => ptr::null_mut(), | |
594 | _ => type_metadata(cx, signature.output, span) | |
d9579d0f | 595 | }); |
1a4d82fc | 596 | |
d9579d0f AL |
597 | // regular arguments |
598 | for &argument_type in &signature.inputs { | |
599 | signature_metadata.push(type_metadata(cx, argument_type, span)); | |
1a4d82fc JJ |
600 | } |
601 | ||
d9579d0f | 602 | return_if_metadata_created_in_meantime!(cx, unique_type_id); |
1a4d82fc | 603 | |
d9579d0f AL |
604 | return MetadataCreationResult::new( |
605 | unsafe { | |
5bcae85e | 606 | llvm::LLVMRustDIBuilderCreateSubroutineType( |
d9579d0f | 607 | DIB(cx), |
5bcae85e | 608 | unknown_file_metadata(cx), |
d9579d0f | 609 | create_DIArray(DIB(cx), &signature_metadata[..])) |
1a4d82fc JJ |
610 | }, |
611 | false); | |
612 | } | |
613 | ||
614 | // FIXME(1563) This is all a bit of a hack because 'trait pointer' is an ill- | |
615 | // defined concept. For the case of an actual trait pointer (i.e., Box<Trait>, | |
616 | // &Trait), trait_object_type should be the whole thing (e.g, Box<Trait>) and | |
617 | // trait_type should be the actual trait (e.g., Trait). Where the trait is part | |
618 | // of a DST struct, there is no trait_object_type and the results of this | |
619 | // function will be a little bit weird. | |
620 | fn trait_pointer_metadata<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, | |
621 | trait_type: Ty<'tcx>, | |
622 | trait_object_type: Option<Ty<'tcx>>, | |
623 | unique_type_id: UniqueTypeId) | |
624 | -> DIType { | |
625 | // The implementation provided here is a stub. It makes sure that the trait | |
626 | // type is assigned the correct name, size, namespace, and source location. | |
627 | // But it does not describe the trait's methods. | |
628 | ||
629 | let def_id = match trait_type.sty { | |
62682a34 | 630 | ty::TyTrait(ref data) => data.principal_def_id(), |
1a4d82fc | 631 | _ => { |
54a0048b SL |
632 | bug!("debuginfo: Unexpected trait-object type in \ |
633 | trait_pointer_metadata(): {:?}", | |
634 | trait_type); | |
1a4d82fc JJ |
635 | } |
636 | }; | |
637 | ||
638 | let trait_object_type = trait_object_type.unwrap_or(trait_type); | |
639 | let trait_type_name = | |
640 | compute_debuginfo_type_name(cx, trait_object_type, false); | |
641 | ||
642 | let (containing_scope, _) = get_namespace_and_span_for_item(cx, def_id); | |
643 | ||
644 | let trait_llvm_type = type_of::type_of(cx, trait_object_type); | |
5bcae85e | 645 | let file_metadata = unknown_file_metadata(cx); |
1a4d82fc JJ |
646 | |
647 | composite_type_metadata(cx, | |
648 | trait_llvm_type, | |
85aaf69f | 649 | &trait_type_name[..], |
1a4d82fc JJ |
650 | unique_type_id, |
651 | &[], | |
652 | containing_scope, | |
5bcae85e | 653 | file_metadata, |
3157f602 | 654 | syntax_pos::DUMMY_SP) |
1a4d82fc JJ |
655 | } |
656 | ||
d9579d0f AL |
657 | pub fn type_metadata<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, |
658 | t: Ty<'tcx>, | |
659 | usage_site_span: Span) | |
660 | -> DIType { | |
1a4d82fc JJ |
661 | // Get the unique type id of this type. |
662 | let unique_type_id = { | |
663 | let mut type_map = debug_context(cx).type_map.borrow_mut(); | |
664 | // First, try to find the type in TypeMap. If we have seen it before, we | |
665 | // can exit early here. | |
666 | match type_map.find_metadata_for_type(t) { | |
667 | Some(metadata) => { | |
668 | return metadata; | |
669 | }, | |
670 | None => { | |
671 | // The Ty is not in the TypeMap but maybe we have already seen | |
672 | // an equivalent type (e.g. only differing in region arguments). | |
673 | // In order to find out, generate the unique type id and look | |
674 | // that up. | |
675 | let unique_type_id = type_map.get_unique_type_id_of_type(cx, t); | |
676 | match type_map.find_metadata_for_unique_id(unique_type_id) { | |
677 | Some(metadata) => { | |
678 | // There is already an equivalent type in the TypeMap. | |
679 | // Register this Ty as an alias in the cache and | |
680 | // return the cached metadata. | |
54a0048b | 681 | type_map.register_type_with_metadata(t, metadata); |
1a4d82fc JJ |
682 | return metadata; |
683 | }, | |
684 | None => { | |
685 | // There really is no type metadata for this type, so | |
686 | // proceed by creating it. | |
687 | unique_type_id | |
688 | } | |
689 | } | |
690 | } | |
691 | } | |
692 | }; | |
693 | ||
694 | debug!("type_metadata: {:?}", t); | |
695 | ||
696 | let sty = &t.sty; | |
697 | let MetadataCreationResult { metadata, already_stored_in_typemap } = match *sty { | |
5bcae85e | 698 | ty::TyNever | |
62682a34 SL |
699 | ty::TyBool | |
700 | ty::TyChar | | |
701 | ty::TyInt(_) | | |
702 | ty::TyUint(_) | | |
703 | ty::TyFloat(_) => { | |
1a4d82fc JJ |
704 | MetadataCreationResult::new(basic_type_metadata(cx, t), false) |
705 | } | |
62682a34 | 706 | ty::TyTuple(ref elements) if elements.is_empty() => { |
1a4d82fc JJ |
707 | MetadataCreationResult::new(basic_type_metadata(cx, t), false) |
708 | } | |
e9174d1e SL |
709 | ty::TyEnum(def, _) => { |
710 | prepare_enum_metadata(cx, | |
711 | t, | |
712 | def.did, | |
713 | unique_type_id, | |
714 | usage_site_span).finalize(cx) | |
1a4d82fc | 715 | } |
62682a34 SL |
716 | ty::TyArray(typ, len) => { |
717 | fixed_vec_metadata(cx, unique_type_id, typ, Some(len as u64), usage_site_span) | |
718 | } | |
719 | ty::TySlice(typ) => { | |
720 | fixed_vec_metadata(cx, unique_type_id, typ, None, usage_site_span) | |
85aaf69f | 721 | } |
62682a34 | 722 | ty::TyStr => { |
85aaf69f | 723 | fixed_vec_metadata(cx, unique_type_id, cx.tcx().types.i8, None, usage_site_span) |
1a4d82fc | 724 | } |
62682a34 | 725 | ty::TyTrait(..) => { |
1a4d82fc JJ |
726 | MetadataCreationResult::new( |
727 | trait_pointer_metadata(cx, t, None, unique_type_id), | |
728 | false) | |
729 | } | |
c1a9b12d SL |
730 | ty::TyBox(ty) | |
731 | ty::TyRawPtr(ty::TypeAndMut{ty, ..}) | | |
732 | ty::TyRef(_, ty::TypeAndMut{ty, ..}) => { | |
1a4d82fc | 733 | match ty.sty { |
62682a34 | 734 | ty::TySlice(typ) => { |
1a4d82fc JJ |
735 | vec_slice_metadata(cx, t, typ, unique_type_id, usage_site_span) |
736 | } | |
62682a34 | 737 | ty::TyStr => { |
1a4d82fc JJ |
738 | vec_slice_metadata(cx, t, cx.tcx().types.u8, unique_type_id, usage_site_span) |
739 | } | |
62682a34 | 740 | ty::TyTrait(..) => { |
1a4d82fc JJ |
741 | MetadataCreationResult::new( |
742 | trait_pointer_metadata(cx, ty, Some(t), unique_type_id), | |
743 | false) | |
744 | } | |
745 | _ => { | |
746 | let pointee_metadata = type_metadata(cx, ty, usage_site_span); | |
747 | ||
748 | match debug_context(cx).type_map | |
749 | .borrow() | |
750 | .find_metadata_for_unique_id(unique_type_id) { | |
751 | Some(metadata) => return metadata, | |
752 | None => { /* proceed normally */ } | |
753 | }; | |
754 | ||
755 | MetadataCreationResult::new(pointer_type_metadata(cx, t, pointee_metadata), | |
756 | false) | |
757 | } | |
758 | } | |
759 | } | |
54a0048b | 760 | ty::TyFnDef(_, _, ref barefnty) | ty::TyFnPtr(ref barefnty) => { |
c1a9b12d SL |
761 | let fn_metadata = subroutine_type_metadata(cx, |
762 | unique_type_id, | |
763 | &barefnty.sig, | |
764 | usage_site_span).metadata; | |
765 | match debug_context(cx).type_map | |
766 | .borrow() | |
767 | .find_metadata_for_unique_id(unique_type_id) { | |
768 | Some(metadata) => return metadata, | |
769 | None => { /* proceed normally */ } | |
770 | }; | |
771 | ||
772 | // This is actually a function pointer, so wrap it in pointer DI | |
773 | MetadataCreationResult::new(pointer_type_metadata(cx, t, fn_metadata), false) | |
774 | ||
1a4d82fc | 775 | } |
c1a9b12d SL |
776 | ty::TyClosure(_, ref substs) => { |
777 | prepare_tuple_metadata(cx, | |
778 | t, | |
779 | &substs.upvar_tys, | |
780 | unique_type_id, | |
781 | usage_site_span).finalize(cx) | |
1a4d82fc | 782 | } |
e9174d1e | 783 | ty::TyStruct(..) => { |
1a4d82fc JJ |
784 | prepare_struct_metadata(cx, |
785 | t, | |
1a4d82fc JJ |
786 | unique_type_id, |
787 | usage_site_span).finalize(cx) | |
788 | } | |
62682a34 | 789 | ty::TyTuple(ref elements) => { |
1a4d82fc JJ |
790 | prepare_tuple_metadata(cx, |
791 | t, | |
85aaf69f | 792 | &elements[..], |
1a4d82fc JJ |
793 | unique_type_id, |
794 | usage_site_span).finalize(cx) | |
795 | } | |
796 | _ => { | |
54a0048b | 797 | bug!("debuginfo: unexpected type in type_metadata: {:?}", sty) |
1a4d82fc JJ |
798 | } |
799 | }; | |
800 | ||
801 | { | |
802 | let mut type_map = debug_context(cx).type_map.borrow_mut(); | |
803 | ||
804 | if already_stored_in_typemap { | |
b039eaaf | 805 | // Also make sure that we already have a TypeMap entry for the unique type id. |
1a4d82fc JJ |
806 | let metadata_for_uid = match type_map.find_metadata_for_unique_id(unique_type_id) { |
807 | Some(metadata) => metadata, | |
808 | None => { | |
809 | let unique_type_id_str = | |
810 | type_map.get_unique_type_id_as_string(unique_type_id); | |
54a0048b SL |
811 | span_bug!(usage_site_span, |
812 | "Expected type metadata for unique \ | |
813 | type id '{}' to already be in \ | |
814 | the debuginfo::TypeMap but it \ | |
815 | was not. (Ty = {})", | |
816 | &unique_type_id_str[..], | |
817 | t); | |
1a4d82fc JJ |
818 | } |
819 | }; | |
820 | ||
821 | match type_map.find_metadata_for_type(t) { | |
822 | Some(metadata) => { | |
823 | if metadata != metadata_for_uid { | |
824 | let unique_type_id_str = | |
825 | type_map.get_unique_type_id_as_string(unique_type_id); | |
54a0048b SL |
826 | span_bug!(usage_site_span, |
827 | "Mismatch between Ty and \ | |
828 | UniqueTypeId maps in \ | |
829 | debuginfo::TypeMap. \ | |
830 | UniqueTypeId={}, Ty={}", | |
831 | &unique_type_id_str[..], | |
832 | t); | |
1a4d82fc JJ |
833 | } |
834 | } | |
835 | None => { | |
54a0048b | 836 | type_map.register_type_with_metadata(t, metadata); |
1a4d82fc JJ |
837 | } |
838 | } | |
839 | } else { | |
54a0048b SL |
840 | type_map.register_type_with_metadata(t, metadata); |
841 | type_map.register_unique_id_with_metadata(unique_type_id, metadata); | |
1a4d82fc JJ |
842 | } |
843 | } | |
844 | ||
845 | metadata | |
846 | } | |
847 | ||
3157f602 | 848 | pub fn file_metadata(cx: &CrateContext, path: &str, full_path: &Option<String>) -> DIFile { |
d9579d0f AL |
849 | // FIXME (#9639): This needs to handle non-utf8 paths |
850 | let work_dir = cx.sess().working_dir.to_str().unwrap(); | |
851 | let file_name = | |
3157f602 XL |
852 | full_path.as_ref().map(|p| p.as_str()).unwrap_or_else(|| { |
853 | if path.starts_with(work_dir) { | |
854 | &path[work_dir.len() + 1..path.len()] | |
855 | } else { | |
856 | path | |
857 | } | |
858 | }); | |
d9579d0f | 859 | |
3157f602 | 860 | file_metadata_(cx, path, file_name, &work_dir) |
e9174d1e SL |
861 | } |
862 | ||
863 | pub fn unknown_file_metadata(cx: &CrateContext) -> DIFile { | |
864 | // Regular filenames should not be empty, so we abuse an empty name as the | |
865 | // key for the special unknown file metadata | |
866 | file_metadata_(cx, "", "<unknown>", "") | |
867 | ||
868 | } | |
869 | ||
870 | fn file_metadata_(cx: &CrateContext, key: &str, file_name: &str, work_dir: &str) -> DIFile { | |
3157f602 XL |
871 | if let Some(file_metadata) = debug_context(cx).created_files.borrow().get(key) { |
872 | return *file_metadata; | |
e9174d1e SL |
873 | } |
874 | ||
875 | debug!("file_metadata: file_name: {}, work_dir: {}", file_name, work_dir); | |
876 | ||
d9579d0f AL |
877 | let file_name = CString::new(file_name).unwrap(); |
878 | let work_dir = CString::new(work_dir).unwrap(); | |
879 | let file_metadata = unsafe { | |
5bcae85e SL |
880 | llvm::LLVMRustDIBuilderCreateFile(DIB(cx), file_name.as_ptr(), |
881 | work_dir.as_ptr()) | |
d9579d0f AL |
882 | }; |
883 | ||
884 | let mut created_files = debug_context(cx).created_files.borrow_mut(); | |
e9174d1e SL |
885 | created_files.insert(key.to_string(), file_metadata); |
886 | file_metadata | |
d9579d0f AL |
887 | } |
888 | ||
889 | /// Finds the scope metadata node for the given AST node. | |
890 | pub fn scope_metadata(fcx: &FunctionContext, | |
891 | node_id: ast::NodeId, | |
892 | error_reporting_span: Span) | |
893 | -> DIScope { | |
894 | let scope_map = &fcx.debug_context | |
54a0048b | 895 | .get_ref(error_reporting_span) |
d9579d0f AL |
896 | .scope_map; |
897 | match scope_map.borrow().get(&node_id).cloned() { | |
898 | Some(scope_metadata) => scope_metadata, | |
899 | None => { | |
900 | let node = fcx.ccx.tcx().map.get(node_id); | |
901 | ||
54a0048b SL |
902 | span_bug!(error_reporting_span, |
903 | "debuginfo: Could not find scope info for node {:?}", | |
904 | node); | |
d9579d0f AL |
905 | } |
906 | } | |
907 | } | |
908 | ||
d9579d0f AL |
909 | fn basic_type_metadata<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, |
910 | t: Ty<'tcx>) -> DIType { | |
911 | ||
912 | debug!("basic_type_metadata: {:?}", t); | |
913 | ||
914 | let (name, encoding) = match t.sty { | |
5bcae85e | 915 | ty::TyNever => ("!", DW_ATE_unsigned), |
62682a34 | 916 | ty::TyTuple(ref elements) if elements.is_empty() => |
92a42be0 SL |
917 | ("()", DW_ATE_unsigned), |
918 | ty::TyBool => ("bool", DW_ATE_boolean), | |
919 | ty::TyChar => ("char", DW_ATE_unsigned_char), | |
920 | ty::TyInt(int_ty) => { | |
9cc50fc6 | 921 | (int_ty.ty_to_string(), DW_ATE_signed) |
d9579d0f | 922 | }, |
92a42be0 | 923 | ty::TyUint(uint_ty) => { |
9cc50fc6 | 924 | (uint_ty.ty_to_string(), DW_ATE_unsigned) |
d9579d0f | 925 | }, |
92a42be0 | 926 | ty::TyFloat(float_ty) => { |
9cc50fc6 | 927 | (float_ty.ty_to_string(), DW_ATE_float) |
d9579d0f | 928 | }, |
54a0048b | 929 | _ => bug!("debuginfo::basic_type_metadata - t is invalid type") |
d9579d0f AL |
930 | }; |
931 | ||
932 | let llvm_type = type_of::type_of(cx, t); | |
933 | let (size, align) = size_and_align_of(cx, llvm_type); | |
934 | let name = CString::new(name).unwrap(); | |
935 | let ty_metadata = unsafe { | |
5bcae85e | 936 | llvm::LLVMRustDIBuilderCreateBasicType( |
d9579d0f AL |
937 | DIB(cx), |
938 | name.as_ptr(), | |
939 | bytes_to_bits(size), | |
940 | bytes_to_bits(align), | |
941 | encoding) | |
942 | }; | |
943 | ||
944 | return ty_metadata; | |
945 | } | |
946 | ||
947 | fn pointer_type_metadata<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, | |
948 | pointer_type: Ty<'tcx>, | |
949 | pointee_type_metadata: DIType) | |
950 | -> DIType { | |
951 | let pointer_llvm_type = type_of::type_of(cx, pointer_type); | |
952 | let (pointer_size, pointer_align) = size_and_align_of(cx, pointer_llvm_type); | |
953 | let name = compute_debuginfo_type_name(cx, pointer_type, false); | |
954 | let name = CString::new(name).unwrap(); | |
955 | let ptr_metadata = unsafe { | |
5bcae85e | 956 | llvm::LLVMRustDIBuilderCreatePointerType( |
d9579d0f AL |
957 | DIB(cx), |
958 | pointee_type_metadata, | |
959 | bytes_to_bits(pointer_size), | |
960 | bytes_to_bits(pointer_align), | |
961 | name.as_ptr()) | |
962 | }; | |
963 | return ptr_metadata; | |
964 | } | |
965 | ||
5bcae85e SL |
966 | pub fn compile_unit_metadata(scc: &SharedCrateContext, |
967 | debug_context: &CrateDebugContext, | |
968 | sess: &Session) | |
969 | -> DIDescriptor { | |
970 | let work_dir = &sess.working_dir; | |
971 | let compile_unit_name = match sess.local_crate_source_file { | |
972 | None => fallback_path(scc), | |
d9579d0f AL |
973 | Some(ref abs_path) => { |
974 | if abs_path.is_relative() { | |
5bcae85e SL |
975 | sess.warn("debuginfo: Invalid path to crate's local root source file!"); |
976 | fallback_path(scc) | |
d9579d0f | 977 | } else { |
9cc50fc6 SL |
978 | match abs_path.strip_prefix(work_dir) { |
979 | Ok(ref p) if p.is_relative() => { | |
d9579d0f AL |
980 | if p.starts_with(Path::new("./")) { |
981 | path2cstr(p) | |
982 | } else { | |
983 | path2cstr(&Path::new(".").join(p)) | |
984 | } | |
985 | } | |
5bcae85e | 986 | _ => fallback_path(scc) |
d9579d0f AL |
987 | } |
988 | } | |
989 | } | |
990 | }; | |
991 | ||
992 | debug!("compile_unit_metadata: {:?}", compile_unit_name); | |
993 | let producer = format!("rustc version {}", | |
994 | (option_env!("CFG_VERSION")).expect("CFG_VERSION")); | |
995 | ||
996 | let compile_unit_name = compile_unit_name.as_ptr(); | |
997 | let work_dir = path2cstr(&work_dir); | |
998 | let producer = CString::new(producer).unwrap(); | |
999 | let flags = "\0"; | |
1000 | let split_name = "\0"; | |
1001 | return unsafe { | |
5bcae85e SL |
1002 | llvm::LLVMRustDIBuilderCreateCompileUnit( |
1003 | debug_context.builder, | |
d9579d0f AL |
1004 | DW_LANG_RUST, |
1005 | compile_unit_name, | |
1006 | work_dir.as_ptr(), | |
1007 | producer.as_ptr(), | |
5bcae85e | 1008 | sess.opts.optimize != config::OptLevel::No, |
d9579d0f AL |
1009 | flags.as_ptr() as *const _, |
1010 | 0, | |
1011 | split_name.as_ptr() as *const _) | |
1012 | }; | |
1013 | ||
5bcae85e SL |
1014 | fn fallback_path(scc: &SharedCrateContext) -> CString { |
1015 | CString::new(scc.link_meta().crate_name.clone()).unwrap() | |
d9579d0f AL |
1016 | } |
1017 | } | |
1018 | ||
1a4d82fc JJ |
1019 | struct MetadataCreationResult { |
1020 | metadata: DIType, | |
1021 | already_stored_in_typemap: bool | |
1022 | } | |
1023 | ||
1024 | impl MetadataCreationResult { | |
1025 | fn new(metadata: DIType, already_stored_in_typemap: bool) -> MetadataCreationResult { | |
1026 | MetadataCreationResult { | |
1027 | metadata: metadata, | |
1028 | already_stored_in_typemap: already_stored_in_typemap | |
1029 | } | |
1030 | } | |
1031 | } | |
1032 | ||
d9579d0f AL |
1033 | #[derive(Debug)] |
1034 | enum MemberOffset { | |
1035 | FixedMemberOffset { bytes: usize }, | |
1036 | // For ComputedMemberOffset, the offset is read from the llvm type definition. | |
1037 | ComputedMemberOffset | |
1038 | } | |
1039 | ||
1040 | // Description of a type member, which can either be a regular field (as in | |
1041 | // structs or tuples) or an enum variant. | |
1042 | #[derive(Debug)] | |
1043 | struct MemberDescription { | |
1044 | name: String, | |
1045 | llvm_type: Type, | |
1046 | type_metadata: DIType, | |
1047 | offset: MemberOffset, | |
1048 | flags: c_uint | |
1049 | } | |
1050 | ||
1051 | // A factory for MemberDescriptions. It produces a list of member descriptions | |
1052 | // for some record-like type. MemberDescriptionFactories are used to defer the | |
1053 | // creation of type member descriptions in order to break cycles arising from | |
1054 | // recursive type definitions. | |
1055 | enum MemberDescriptionFactory<'tcx> { | |
1056 | StructMDF(StructMemberDescriptionFactory<'tcx>), | |
1057 | TupleMDF(TupleMemberDescriptionFactory<'tcx>), | |
1058 | EnumMDF(EnumMemberDescriptionFactory<'tcx>), | |
1059 | VariantMDF(VariantMemberDescriptionFactory<'tcx>) | |
1060 | } | |
1061 | ||
1062 | impl<'tcx> MemberDescriptionFactory<'tcx> { | |
1063 | fn create_member_descriptions<'a>(&self, cx: &CrateContext<'a, 'tcx>) | |
1064 | -> Vec<MemberDescription> { | |
1065 | match *self { | |
1066 | StructMDF(ref this) => { | |
1067 | this.create_member_descriptions(cx) | |
1068 | } | |
1069 | TupleMDF(ref this) => { | |
1070 | this.create_member_descriptions(cx) | |
1071 | } | |
1072 | EnumMDF(ref this) => { | |
1073 | this.create_member_descriptions(cx) | |
1074 | } | |
1075 | VariantMDF(ref this) => { | |
1076 | this.create_member_descriptions(cx) | |
1077 | } | |
1078 | } | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | //=----------------------------------------------------------------------------- | |
1083 | // Structs | |
1084 | //=----------------------------------------------------------------------------- | |
1085 | ||
1086 | // Creates MemberDescriptions for the fields of a struct | |
1087 | struct StructMemberDescriptionFactory<'tcx> { | |
e9174d1e SL |
1088 | variant: ty::VariantDef<'tcx>, |
1089 | substs: &'tcx subst::Substs<'tcx>, | |
d9579d0f AL |
1090 | is_simd: bool, |
1091 | span: Span, | |
1092 | } | |
1093 | ||
1094 | impl<'tcx> StructMemberDescriptionFactory<'tcx> { | |
1095 | fn create_member_descriptions<'a>(&self, cx: &CrateContext<'a, 'tcx>) | |
1096 | -> Vec<MemberDescription> { | |
5bcae85e | 1097 | if self.variant.kind == ty::VariantKind::Unit { |
d9579d0f AL |
1098 | return Vec::new(); |
1099 | } | |
1100 | ||
1101 | let field_size = if self.is_simd { | |
e9174d1e SL |
1102 | let fty = monomorphize::field_ty(cx.tcx(), |
1103 | self.substs, | |
1104 | &self.variant.fields[0]); | |
1105 | Some(machine::llsize_of_alloc( | |
1106 | cx, | |
1107 | type_of::type_of(cx, fty) | |
1108 | ) as usize) | |
d9579d0f | 1109 | } else { |
e9174d1e | 1110 | None |
d9579d0f AL |
1111 | }; |
1112 | ||
e9174d1e | 1113 | self.variant.fields.iter().enumerate().map(|(i, f)| { |
5bcae85e | 1114 | let name = if self.variant.kind == ty::VariantKind::Tuple { |
d9579d0f AL |
1115 | format!("__{}", i) |
1116 | } else { | |
e9174d1e | 1117 | f.name.to_string() |
d9579d0f | 1118 | }; |
e9174d1e | 1119 | let fty = monomorphize::field_ty(cx.tcx(), self.substs, f); |
1a4d82fc | 1120 | |
d9579d0f | 1121 | let offset = if self.is_simd { |
e9174d1e | 1122 | FixedMemberOffset { bytes: i * field_size.unwrap() } |
d9579d0f AL |
1123 | } else { |
1124 | ComputedMemberOffset | |
1125 | }; | |
1126 | ||
1127 | MemberDescription { | |
1128 | name: name, | |
e9174d1e SL |
1129 | llvm_type: type_of::type_of(cx, fty), |
1130 | type_metadata: type_metadata(cx, fty, self.span), | |
d9579d0f AL |
1131 | offset: offset, |
1132 | flags: FLAGS_NONE, | |
1133 | } | |
1134 | }).collect() | |
1a4d82fc JJ |
1135 | } |
1136 | } | |
1137 | ||
1a4d82fc | 1138 | |
d9579d0f AL |
1139 | fn prepare_struct_metadata<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, |
1140 | struct_type: Ty<'tcx>, | |
d9579d0f AL |
1141 | unique_type_id: UniqueTypeId, |
1142 | span: Span) | |
1143 | -> RecursiveTypeDescription<'tcx> { | |
1144 | let struct_name = compute_debuginfo_type_name(cx, struct_type, false); | |
1145 | let struct_llvm_type = type_of::in_memory_type_of(cx, struct_type); | |
1146 | ||
a7813a04 XL |
1147 | let (struct_def_id, variant, substs) = match struct_type.sty { |
1148 | ty::TyStruct(def, substs) => (def.did, def.struct_variant(), substs), | |
54a0048b | 1149 | _ => bug!("prepare_struct_metadata on a non-struct") |
e9174d1e SL |
1150 | }; |
1151 | ||
a7813a04 | 1152 | let (containing_scope, _) = get_namespace_and_span_for_item(cx, struct_def_id); |
1a4d82fc | 1153 | |
d9579d0f AL |
1154 | let struct_metadata_stub = create_struct_stub(cx, |
1155 | struct_llvm_type, | |
1156 | &struct_name, | |
1157 | unique_type_id, | |
1158 | containing_scope); | |
85aaf69f | 1159 | |
d9579d0f AL |
1160 | create_and_register_recursive_type_forward_declaration( |
1161 | cx, | |
1162 | struct_type, | |
1163 | unique_type_id, | |
1164 | struct_metadata_stub, | |
1165 | struct_llvm_type, | |
1166 | StructMDF(StructMemberDescriptionFactory { | |
e9174d1e SL |
1167 | variant: variant, |
1168 | substs: substs, | |
1169 | is_simd: struct_type.is_simd(), | |
d9579d0f AL |
1170 | span: span, |
1171 | }) | |
1172 | ) | |
1a4d82fc JJ |
1173 | } |
1174 | ||
d9579d0f | 1175 | |
1a4d82fc | 1176 | //=----------------------------------------------------------------------------- |
d9579d0f | 1177 | // Tuples |
1a4d82fc JJ |
1178 | //=----------------------------------------------------------------------------- |
1179 | ||
d9579d0f AL |
1180 | // Creates MemberDescriptions for the fields of a tuple |
1181 | struct TupleMemberDescriptionFactory<'tcx> { | |
1182 | component_types: Vec<Ty<'tcx>>, | |
1183 | span: Span, | |
1a4d82fc JJ |
1184 | } |
1185 | ||
d9579d0f AL |
1186 | impl<'tcx> TupleMemberDescriptionFactory<'tcx> { |
1187 | fn create_member_descriptions<'a>(&self, cx: &CrateContext<'a, 'tcx>) | |
1188 | -> Vec<MemberDescription> { | |
1189 | self.component_types | |
1190 | .iter() | |
1191 | .enumerate() | |
1192 | .map(|(i, &component_type)| { | |
1193 | MemberDescription { | |
1194 | name: format!("__{}", i), | |
1195 | llvm_type: type_of::type_of(cx, component_type), | |
1196 | type_metadata: type_metadata(cx, component_type, self.span), | |
1197 | offset: ComputedMemberOffset, | |
1198 | flags: FLAGS_NONE, | |
1199 | } | |
1200 | }).collect() | |
1201 | } | |
1a4d82fc JJ |
1202 | } |
1203 | ||
d9579d0f AL |
1204 | fn prepare_tuple_metadata<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, |
1205 | tuple_type: Ty<'tcx>, | |
1206 | component_types: &[Ty<'tcx>], | |
1207 | unique_type_id: UniqueTypeId, | |
1208 | span: Span) | |
1209 | -> RecursiveTypeDescription<'tcx> { | |
1210 | let tuple_name = compute_debuginfo_type_name(cx, tuple_type, false); | |
1211 | let tuple_llvm_type = type_of::type_of(cx, tuple_type); | |
1a4d82fc | 1212 | |
d9579d0f AL |
1213 | create_and_register_recursive_type_forward_declaration( |
1214 | cx, | |
1215 | tuple_type, | |
1216 | unique_type_id, | |
1217 | create_struct_stub(cx, | |
1218 | tuple_llvm_type, | |
1219 | &tuple_name[..], | |
1220 | unique_type_id, | |
e9174d1e | 1221 | NO_SCOPE_METADATA), |
d9579d0f AL |
1222 | tuple_llvm_type, |
1223 | TupleMDF(TupleMemberDescriptionFactory { | |
1224 | component_types: component_types.to_vec(), | |
1225 | span: span, | |
1226 | }) | |
1227 | ) | |
1a4d82fc JJ |
1228 | } |
1229 | ||
1a4d82fc | 1230 | |
d9579d0f AL |
1231 | //=----------------------------------------------------------------------------- |
1232 | // Enums | |
1233 | //=----------------------------------------------------------------------------- | |
1a4d82fc | 1234 | |
d9579d0f AL |
1235 | // Describes the members of an enum value: An enum is described as a union of |
1236 | // structs in DWARF. This MemberDescriptionFactory provides the description for | |
1237 | // the members of this union; so for every variant of the given enum, this | |
1238 | // factory will produce one MemberDescription (all with no name and a fixed | |
1239 | // offset of zero bytes). | |
1240 | struct EnumMemberDescriptionFactory<'tcx> { | |
1241 | enum_type: Ty<'tcx>, | |
1242 | type_rep: Rc<adt::Repr<'tcx>>, | |
d9579d0f AL |
1243 | discriminant_type_metadata: Option<DIType>, |
1244 | containing_scope: DIScope, | |
1245 | file_metadata: DIFile, | |
1246 | span: Span, | |
1a4d82fc JJ |
1247 | } |
1248 | ||
d9579d0f AL |
1249 | impl<'tcx> EnumMemberDescriptionFactory<'tcx> { |
1250 | fn create_member_descriptions<'a>(&self, cx: &CrateContext<'a, 'tcx>) | |
1251 | -> Vec<MemberDescription> { | |
e9174d1e | 1252 | let adt = &self.enum_type.ty_adt_def().unwrap(); |
d9579d0f AL |
1253 | match *self.type_rep { |
1254 | adt::General(_, ref struct_defs, _) => { | |
1255 | let discriminant_info = RegularDiscriminant(self.discriminant_type_metadata | |
1256 | .expect("")); | |
d9579d0f AL |
1257 | struct_defs |
1258 | .iter() | |
1259 | .enumerate() | |
1260 | .map(|(i, struct_def)| { | |
1261 | let (variant_type_metadata, | |
1262 | variant_llvm_type, | |
1263 | member_desc_factory) = | |
1264 | describe_enum_variant(cx, | |
1265 | self.enum_type, | |
1266 | struct_def, | |
e9174d1e | 1267 | &adt.variants[i], |
d9579d0f AL |
1268 | discriminant_info, |
1269 | self.containing_scope, | |
1270 | self.span); | |
1a4d82fc | 1271 | |
d9579d0f AL |
1272 | let member_descriptions = member_desc_factory |
1273 | .create_member_descriptions(cx); | |
1a4d82fc | 1274 | |
d9579d0f AL |
1275 | set_members_of_composite_type(cx, |
1276 | variant_type_metadata, | |
1277 | variant_llvm_type, | |
1278 | &member_descriptions); | |
1279 | MemberDescription { | |
1280 | name: "".to_string(), | |
1281 | llvm_type: variant_llvm_type, | |
1282 | type_metadata: variant_type_metadata, | |
1283 | offset: FixedMemberOffset { bytes: 0 }, | |
1284 | flags: FLAGS_NONE | |
1285 | } | |
1286 | }).collect() | |
1287 | }, | |
1288 | adt::Univariant(ref struct_def, _) => { | |
e9174d1e | 1289 | assert!(adt.variants.len() <= 1); |
1a4d82fc | 1290 | |
e9174d1e | 1291 | if adt.variants.is_empty() { |
d9579d0f AL |
1292 | vec![] |
1293 | } else { | |
1294 | let (variant_type_metadata, | |
1295 | variant_llvm_type, | |
1296 | member_description_factory) = | |
1297 | describe_enum_variant(cx, | |
1298 | self.enum_type, | |
1299 | struct_def, | |
e9174d1e | 1300 | &adt.variants[0], |
d9579d0f AL |
1301 | NoDiscriminant, |
1302 | self.containing_scope, | |
1303 | self.span); | |
1a4d82fc | 1304 | |
d9579d0f AL |
1305 | let member_descriptions = |
1306 | member_description_factory.create_member_descriptions(cx); | |
1a4d82fc | 1307 | |
d9579d0f AL |
1308 | set_members_of_composite_type(cx, |
1309 | variant_type_metadata, | |
1310 | variant_llvm_type, | |
1311 | &member_descriptions[..]); | |
1312 | vec![ | |
1313 | MemberDescription { | |
1314 | name: "".to_string(), | |
1315 | llvm_type: variant_llvm_type, | |
1316 | type_metadata: variant_type_metadata, | |
1317 | offset: FixedMemberOffset { bytes: 0 }, | |
1318 | flags: FLAGS_NONE | |
1319 | } | |
1320 | ] | |
1321 | } | |
1322 | } | |
1323 | adt::RawNullablePointer { nndiscr: non_null_variant_index, nnty, .. } => { | |
1324 | // As far as debuginfo is concerned, the pointer this enum | |
1325 | // represents is still wrapped in a struct. This is to make the | |
1326 | // DWARF representation of enums uniform. | |
1a4d82fc | 1327 | |
d9579d0f | 1328 | // First create a description of the artificial wrapper struct: |
9cc50fc6 | 1329 | let non_null_variant = &adt.variants[non_null_variant_index.0 as usize]; |
c1a9b12d | 1330 | let non_null_variant_name = non_null_variant.name.as_str(); |
1a4d82fc | 1331 | |
d9579d0f AL |
1332 | // The llvm type and metadata of the pointer |
1333 | let non_null_llvm_type = type_of::type_of(cx, nnty); | |
1334 | let non_null_type_metadata = type_metadata(cx, nnty, self.span); | |
1a4d82fc | 1335 | |
d9579d0f AL |
1336 | // The type of the artificial struct wrapping the pointer |
1337 | let artificial_struct_llvm_type = Type::struct_(cx, | |
1338 | &[non_null_llvm_type], | |
1339 | false); | |
1a4d82fc | 1340 | |
d9579d0f AL |
1341 | // For the metadata of the wrapper struct, we need to create a |
1342 | // MemberDescription of the struct's single field. | |
1343 | let sole_struct_member_description = MemberDescription { | |
5bcae85e | 1344 | name: match non_null_variant.kind { |
e9174d1e | 1345 | ty::VariantKind::Tuple => "__0".to_string(), |
b039eaaf | 1346 | ty::VariantKind::Struct => { |
e9174d1e SL |
1347 | non_null_variant.fields[0].name.to_string() |
1348 | } | |
54a0048b | 1349 | ty::VariantKind::Unit => bug!() |
d9579d0f AL |
1350 | }, |
1351 | llvm_type: non_null_llvm_type, | |
1352 | type_metadata: non_null_type_metadata, | |
1353 | offset: FixedMemberOffset { bytes: 0 }, | |
1354 | flags: FLAGS_NONE | |
1355 | }; | |
1a4d82fc | 1356 | |
d9579d0f AL |
1357 | let unique_type_id = debug_context(cx).type_map |
1358 | .borrow_mut() | |
1359 | .get_unique_type_id_of_enum_variant( | |
1360 | cx, | |
1361 | self.enum_type, | |
1362 | &non_null_variant_name); | |
1a4d82fc | 1363 | |
d9579d0f AL |
1364 | // Now we can create the metadata of the artificial struct |
1365 | let artificial_struct_metadata = | |
1366 | composite_type_metadata(cx, | |
1367 | artificial_struct_llvm_type, | |
1368 | &non_null_variant_name, | |
1369 | unique_type_id, | |
1370 | &[sole_struct_member_description], | |
1371 | self.containing_scope, | |
1372 | self.file_metadata, | |
3157f602 | 1373 | syntax_pos::DUMMY_SP); |
1a4d82fc | 1374 | |
d9579d0f AL |
1375 | // Encode the information about the null variant in the union |
1376 | // member's name. | |
9cc50fc6 | 1377 | let null_variant_index = (1 - non_null_variant_index.0) as usize; |
e9174d1e | 1378 | let null_variant_name = adt.variants[null_variant_index].name; |
d9579d0f AL |
1379 | let union_member_name = format!("RUST$ENCODED$ENUM${}${}", |
1380 | 0, | |
1381 | null_variant_name); | |
1a4d82fc | 1382 | |
d9579d0f AL |
1383 | // Finally create the (singleton) list of descriptions of union |
1384 | // members. | |
1385 | vec![ | |
1386 | MemberDescription { | |
1387 | name: union_member_name, | |
1388 | llvm_type: artificial_struct_llvm_type, | |
1389 | type_metadata: artificial_struct_metadata, | |
1390 | offset: FixedMemberOffset { bytes: 0 }, | |
1391 | flags: FLAGS_NONE | |
1392 | } | |
1393 | ] | |
1394 | }, | |
1395 | adt::StructWrappedNullablePointer { nonnull: ref struct_def, | |
1396 | nndiscr, | |
1397 | ref discrfield, ..} => { | |
1398 | // Create a description of the non-null variant | |
1399 | let (variant_type_metadata, variant_llvm_type, member_description_factory) = | |
1400 | describe_enum_variant(cx, | |
1401 | self.enum_type, | |
1402 | struct_def, | |
9cc50fc6 | 1403 | &adt.variants[nndiscr.0 as usize], |
d9579d0f AL |
1404 | OptimizedDiscriminant, |
1405 | self.containing_scope, | |
1406 | self.span); | |
1a4d82fc | 1407 | |
d9579d0f AL |
1408 | let variant_member_descriptions = |
1409 | member_description_factory.create_member_descriptions(cx); | |
1a4d82fc | 1410 | |
d9579d0f AL |
1411 | set_members_of_composite_type(cx, |
1412 | variant_type_metadata, | |
1413 | variant_llvm_type, | |
1414 | &variant_member_descriptions[..]); | |
1a4d82fc | 1415 | |
d9579d0f AL |
1416 | // Encode the information about the null variant in the union |
1417 | // member's name. | |
9cc50fc6 | 1418 | let null_variant_index = (1 - nndiscr.0) as usize; |
e9174d1e | 1419 | let null_variant_name = adt.variants[null_variant_index].name; |
d9579d0f AL |
1420 | let discrfield = discrfield.iter() |
1421 | .skip(1) | |
1422 | .map(|x| x.to_string()) | |
c1a9b12d | 1423 | .collect::<Vec<_>>().join("$"); |
d9579d0f AL |
1424 | let union_member_name = format!("RUST$ENCODED$ENUM${}${}", |
1425 | discrfield, | |
1426 | null_variant_name); | |
1a4d82fc | 1427 | |
d9579d0f AL |
1428 | // Create the (singleton) list of descriptions of union members. |
1429 | vec![ | |
1430 | MemberDescription { | |
1431 | name: union_member_name, | |
1432 | llvm_type: variant_llvm_type, | |
1433 | type_metadata: variant_type_metadata, | |
1434 | offset: FixedMemberOffset { bytes: 0 }, | |
1435 | flags: FLAGS_NONE | |
1436 | } | |
1437 | ] | |
1438 | }, | |
54a0048b | 1439 | adt::CEnum(..) => span_bug!(self.span, "This should be unreachable.") |
1a4d82fc JJ |
1440 | } |
1441 | } | |
d9579d0f | 1442 | } |
1a4d82fc | 1443 | |
d9579d0f AL |
1444 | // Creates MemberDescriptions for the fields of a single enum variant. |
1445 | struct VariantMemberDescriptionFactory<'tcx> { | |
1446 | args: Vec<(String, Ty<'tcx>)>, | |
1447 | discriminant_type_metadata: Option<DIType>, | |
1448 | span: Span, | |
1449 | } | |
1a4d82fc | 1450 | |
d9579d0f AL |
1451 | impl<'tcx> VariantMemberDescriptionFactory<'tcx> { |
1452 | fn create_member_descriptions<'a>(&self, cx: &CrateContext<'a, 'tcx>) | |
1453 | -> Vec<MemberDescription> { | |
1454 | self.args.iter().enumerate().map(|(i, &(ref name, ty))| { | |
1455 | MemberDescription { | |
1456 | name: name.to_string(), | |
1457 | llvm_type: type_of::type_of(cx, ty), | |
1458 | type_metadata: match self.discriminant_type_metadata { | |
1459 | Some(metadata) if i == 0 => metadata, | |
1460 | _ => type_metadata(cx, ty, self.span) | |
1461 | }, | |
1462 | offset: ComputedMemberOffset, | |
1463 | flags: FLAGS_NONE | |
1a4d82fc | 1464 | } |
d9579d0f | 1465 | }).collect() |
1a4d82fc | 1466 | } |
d9579d0f | 1467 | } |
1a4d82fc | 1468 | |
d9579d0f AL |
1469 | #[derive(Copy, Clone)] |
1470 | enum EnumDiscriminantInfo { | |
1471 | RegularDiscriminant(DIType), | |
1472 | OptimizedDiscriminant, | |
1473 | NoDiscriminant | |
1474 | } | |
1a4d82fc | 1475 | |
d9579d0f AL |
1476 | // Returns a tuple of (1) type_metadata_stub of the variant, (2) the llvm_type |
1477 | // of the variant, and (3) a MemberDescriptionFactory for producing the | |
1478 | // descriptions of the fields of the variant. This is a rudimentary version of a | |
1479 | // full RecursiveTypeDescription. | |
1480 | fn describe_enum_variant<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, | |
1481 | enum_type: Ty<'tcx>, | |
1482 | struct_def: &adt::Struct<'tcx>, | |
e9174d1e | 1483 | variant: ty::VariantDef<'tcx>, |
d9579d0f AL |
1484 | discriminant_info: EnumDiscriminantInfo, |
1485 | containing_scope: DIScope, | |
1486 | span: Span) | |
1487 | -> (DICompositeType, Type, MemberDescriptionFactory<'tcx>) { | |
1488 | let variant_llvm_type = | |
1489 | Type::struct_(cx, &struct_def.fields | |
1490 | .iter() | |
1491 | .map(|&t| type_of::type_of(cx, t)) | |
1492 | .collect::<Vec<_>>() | |
1493 | , | |
1494 | struct_def.packed); | |
1495 | // Could do some consistency checks here: size, align, field count, discr type | |
1a4d82fc | 1496 | |
e9174d1e | 1497 | let variant_name = variant.name.as_str(); |
d9579d0f AL |
1498 | let unique_type_id = debug_context(cx).type_map |
1499 | .borrow_mut() | |
1500 | .get_unique_type_id_of_enum_variant( | |
1501 | cx, | |
1502 | enum_type, | |
c1a9b12d | 1503 | &variant_name); |
1a4d82fc | 1504 | |
d9579d0f AL |
1505 | let metadata_stub = create_struct_stub(cx, |
1506 | variant_llvm_type, | |
c1a9b12d | 1507 | &variant_name, |
d9579d0f AL |
1508 | unique_type_id, |
1509 | containing_scope); | |
1a4d82fc | 1510 | |
d9579d0f | 1511 | // Get the argument names from the enum variant info |
5bcae85e | 1512 | let mut arg_names: Vec<_> = match variant.kind { |
e9174d1e SL |
1513 | ty::VariantKind::Unit => vec![], |
1514 | ty::VariantKind::Tuple => { | |
1515 | variant.fields | |
1516 | .iter() | |
1517 | .enumerate() | |
1518 | .map(|(i, _)| format!("__{}", i)) | |
1519 | .collect() | |
d9579d0f | 1520 | } |
b039eaaf | 1521 | ty::VariantKind::Struct => { |
e9174d1e SL |
1522 | variant.fields |
1523 | .iter() | |
1524 | .map(|f| f.name.to_string()) | |
1525 | .collect() | |
d9579d0f AL |
1526 | } |
1527 | }; | |
1a4d82fc | 1528 | |
d9579d0f AL |
1529 | // If this is not a univariant enum, there is also the discriminant field. |
1530 | match discriminant_info { | |
1531 | RegularDiscriminant(_) => arg_names.insert(0, "RUST$ENUM$DISR".to_string()), | |
1532 | _ => { /* do nothing */ } | |
1533 | }; | |
1a4d82fc | 1534 | |
d9579d0f AL |
1535 | // Build an array of (field name, field type) pairs to be captured in the factory closure. |
1536 | let args: Vec<(String, Ty)> = arg_names.iter() | |
62682a34 | 1537 | .zip(&struct_def.fields) |
d9579d0f AL |
1538 | .map(|(s, &t)| (s.to_string(), t)) |
1539 | .collect(); | |
1a4d82fc | 1540 | |
d9579d0f AL |
1541 | let member_description_factory = |
1542 | VariantMDF(VariantMemberDescriptionFactory { | |
1543 | args: args, | |
1544 | discriminant_type_metadata: match discriminant_info { | |
1545 | RegularDiscriminant(discriminant_type_metadata) => { | |
1546 | Some(discriminant_type_metadata) | |
1a4d82fc | 1547 | } |
d9579d0f AL |
1548 | _ => None |
1549 | }, | |
1550 | span: span, | |
1551 | }); | |
1a4d82fc | 1552 | |
d9579d0f AL |
1553 | (metadata_stub, variant_llvm_type, member_description_factory) |
1554 | } | |
1a4d82fc | 1555 | |
d9579d0f AL |
1556 | fn prepare_enum_metadata<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, |
1557 | enum_type: Ty<'tcx>, | |
e9174d1e | 1558 | enum_def_id: DefId, |
d9579d0f AL |
1559 | unique_type_id: UniqueTypeId, |
1560 | span: Span) | |
1561 | -> RecursiveTypeDescription<'tcx> { | |
1562 | let enum_name = compute_debuginfo_type_name(cx, enum_type, false); | |
1a4d82fc | 1563 | |
e9174d1e SL |
1564 | let (containing_scope, _) = get_namespace_and_span_for_item(cx, enum_def_id); |
1565 | // FIXME: This should emit actual file metadata for the enum, but we | |
1566 | // currently can't get the necessary information when it comes to types | |
1567 | // imported from other crates. Formerly we violated the ODR when performing | |
1568 | // LTO because we emitted debuginfo for the same type with varying file | |
1569 | // metadata, so as a workaround we pretend that the type comes from | |
1570 | // <unknown> | |
1571 | let file_metadata = unknown_file_metadata(cx); | |
1a4d82fc | 1572 | |
e9174d1e | 1573 | let variants = &enum_type.ty_adt_def().unwrap().variants; |
1a4d82fc | 1574 | |
d9579d0f AL |
1575 | let enumerators_metadata: Vec<DIDescriptor> = variants |
1576 | .iter() | |
1577 | .map(|v| { | |
c1a9b12d | 1578 | let token = v.name.as_str(); |
d9579d0f AL |
1579 | let name = CString::new(token.as_bytes()).unwrap(); |
1580 | unsafe { | |
5bcae85e | 1581 | llvm::LLVMRustDIBuilderCreateEnumerator( |
d9579d0f AL |
1582 | DIB(cx), |
1583 | name.as_ptr(), | |
54a0048b | 1584 | v.disr_val.to_u64_unchecked()) |
1a4d82fc | 1585 | } |
d9579d0f AL |
1586 | }) |
1587 | .collect(); | |
1a4d82fc | 1588 | |
b039eaaf | 1589 | let discriminant_type_metadata = |inttype: syntax::attr::IntType| { |
c1a9b12d | 1590 | let disr_type_key = (enum_def_id, inttype); |
d9579d0f AL |
1591 | let cached_discriminant_type_metadata = debug_context(cx).created_enum_disr_types |
1592 | .borrow() | |
c1a9b12d | 1593 | .get(&disr_type_key).cloned(); |
d9579d0f AL |
1594 | match cached_discriminant_type_metadata { |
1595 | Some(discriminant_type_metadata) => discriminant_type_metadata, | |
1596 | None => { | |
1597 | let discriminant_llvm_type = adt::ll_inttype(cx, inttype); | |
1598 | let (discriminant_size, discriminant_align) = | |
1599 | size_and_align_of(cx, discriminant_llvm_type); | |
1600 | let discriminant_base_type_metadata = | |
1601 | type_metadata(cx, | |
1602 | adt::ty_of_inttype(cx.tcx(), inttype), | |
3157f602 | 1603 | syntax_pos::DUMMY_SP); |
d9579d0f | 1604 | let discriminant_name = get_enum_discriminant_name(cx, enum_def_id); |
1a4d82fc | 1605 | |
d9579d0f AL |
1606 | let name = CString::new(discriminant_name.as_bytes()).unwrap(); |
1607 | let discriminant_type_metadata = unsafe { | |
5bcae85e | 1608 | llvm::LLVMRustDIBuilderCreateEnumerationType( |
d9579d0f AL |
1609 | DIB(cx), |
1610 | containing_scope, | |
1611 | name.as_ptr(), | |
5bcae85e | 1612 | file_metadata, |
d9579d0f AL |
1613 | UNKNOWN_LINE_NUMBER, |
1614 | bytes_to_bits(discriminant_size), | |
1615 | bytes_to_bits(discriminant_align), | |
1616 | create_DIArray(DIB(cx), &enumerators_metadata), | |
1617 | discriminant_base_type_metadata) | |
1618 | }; | |
1a4d82fc | 1619 | |
d9579d0f AL |
1620 | debug_context(cx).created_enum_disr_types |
1621 | .borrow_mut() | |
c1a9b12d | 1622 | .insert(disr_type_key, discriminant_type_metadata); |
1a4d82fc | 1623 | |
d9579d0f | 1624 | discriminant_type_metadata |
1a4d82fc JJ |
1625 | } |
1626 | } | |
d9579d0f | 1627 | }; |
1a4d82fc | 1628 | |
d9579d0f | 1629 | let type_rep = adt::represent_type(cx, enum_type); |
1a4d82fc | 1630 | |
d9579d0f AL |
1631 | let discriminant_type_metadata = match *type_rep { |
1632 | adt::CEnum(inttype, _, _) => { | |
1633 | return FinalMetadata(discriminant_type_metadata(inttype)) | |
1634 | }, | |
1635 | adt::RawNullablePointer { .. } | | |
1636 | adt::StructWrappedNullablePointer { .. } | | |
1637 | adt::Univariant(..) => None, | |
1638 | adt::General(inttype, _, _) => Some(discriminant_type_metadata(inttype)), | |
1639 | }; | |
1a4d82fc | 1640 | |
d9579d0f AL |
1641 | let enum_llvm_type = type_of::type_of(cx, enum_type); |
1642 | let (enum_type_size, enum_type_align) = size_and_align_of(cx, enum_llvm_type); | |
1a4d82fc | 1643 | |
d9579d0f AL |
1644 | let unique_type_id_str = debug_context(cx) |
1645 | .type_map | |
1646 | .borrow() | |
1647 | .get_unique_type_id_as_string(unique_type_id); | |
1a4d82fc | 1648 | |
d9579d0f AL |
1649 | let enum_name = CString::new(enum_name).unwrap(); |
1650 | let unique_type_id_str = CString::new(unique_type_id_str.as_bytes()).unwrap(); | |
1651 | let enum_metadata = unsafe { | |
5bcae85e | 1652 | llvm::LLVMRustDIBuilderCreateUnionType( |
d9579d0f AL |
1653 | DIB(cx), |
1654 | containing_scope, | |
1655 | enum_name.as_ptr(), | |
62682a34 | 1656 | file_metadata, |
d9579d0f AL |
1657 | UNKNOWN_LINE_NUMBER, |
1658 | bytes_to_bits(enum_type_size), | |
1659 | bytes_to_bits(enum_type_align), | |
1660 | 0, // Flags | |
1661 | ptr::null_mut(), | |
1662 | 0, // RuntimeLang | |
1663 | unique_type_id_str.as_ptr()) | |
1664 | }; | |
1a4d82fc | 1665 | |
d9579d0f AL |
1666 | return create_and_register_recursive_type_forward_declaration( |
1667 | cx, | |
1668 | enum_type, | |
1669 | unique_type_id, | |
1670 | enum_metadata, | |
1671 | enum_llvm_type, | |
1672 | EnumMDF(EnumMemberDescriptionFactory { | |
1673 | enum_type: enum_type, | |
1674 | type_rep: type_rep.clone(), | |
d9579d0f AL |
1675 | discriminant_type_metadata: discriminant_type_metadata, |
1676 | containing_scope: containing_scope, | |
1677 | file_metadata: file_metadata, | |
1678 | span: span, | |
1679 | }), | |
1680 | ); | |
1a4d82fc | 1681 | |
d9579d0f | 1682 | fn get_enum_discriminant_name(cx: &CrateContext, |
e9174d1e | 1683 | def_id: DefId) |
d9579d0f | 1684 | -> token::InternedString { |
e9174d1e | 1685 | cx.tcx().item_name(def_id).as_str() |
d9579d0f AL |
1686 | } |
1687 | } | |
1a4d82fc | 1688 | |
d9579d0f AL |
1689 | /// Creates debug information for a composite type, that is, anything that |
1690 | /// results in a LLVM struct. | |
1691 | /// | |
1692 | /// Examples of Rust types to use this are: structs, tuples, boxes, vecs, and enums. | |
1693 | fn composite_type_metadata(cx: &CrateContext, | |
1694 | composite_llvm_type: Type, | |
1695 | composite_type_name: &str, | |
1696 | composite_type_unique_id: UniqueTypeId, | |
1697 | member_descriptions: &[MemberDescription], | |
1698 | containing_scope: DIScope, | |
1a4d82fc | 1699 | |
d9579d0f AL |
1700 | // Ignore source location information as long as it |
1701 | // can't be reconstructed for non-local crates. | |
1702 | _file_metadata: DIFile, | |
1703 | _definition_span: Span) | |
1704 | -> DICompositeType { | |
1705 | // Create the (empty) struct metadata node ... | |
1706 | let composite_type_metadata = create_struct_stub(cx, | |
1707 | composite_llvm_type, | |
1708 | composite_type_name, | |
1709 | composite_type_unique_id, | |
1710 | containing_scope); | |
1711 | // ... and immediately create and add the member descriptions. | |
1712 | set_members_of_composite_type(cx, | |
1713 | composite_type_metadata, | |
1714 | composite_llvm_type, | |
1715 | member_descriptions); | |
1a4d82fc | 1716 | |
d9579d0f AL |
1717 | return composite_type_metadata; |
1718 | } | |
1a4d82fc | 1719 | |
d9579d0f AL |
1720 | fn set_members_of_composite_type(cx: &CrateContext, |
1721 | composite_type_metadata: DICompositeType, | |
1722 | composite_llvm_type: Type, | |
1723 | member_descriptions: &[MemberDescription]) { | |
1724 | // In some rare cases LLVM metadata uniquing would lead to an existing type | |
1725 | // description being used instead of a new one created in | |
1726 | // create_struct_stub. This would cause a hard to trace assertion in | |
1727 | // DICompositeType::SetTypeArray(). The following check makes sure that we | |
1728 | // get a better error message if this should happen again due to some | |
1729 | // regression. | |
1730 | { | |
1731 | let mut composite_types_completed = | |
1732 | debug_context(cx).composite_types_completed.borrow_mut(); | |
1733 | if composite_types_completed.contains(&composite_type_metadata) { | |
54a0048b SL |
1734 | bug!("debuginfo::set_members_of_composite_type() - \ |
1735 | Already completed forward declaration re-encountered."); | |
d9579d0f AL |
1736 | } else { |
1737 | composite_types_completed.insert(composite_type_metadata); | |
1738 | } | |
1739 | } | |
1a4d82fc | 1740 | |
d9579d0f AL |
1741 | let member_metadata: Vec<DIDescriptor> = member_descriptions |
1742 | .iter() | |
1743 | .enumerate() | |
1744 | .map(|(i, member_description)| { | |
1745 | let (member_size, member_align) = size_and_align_of(cx, member_description.llvm_type); | |
1746 | let member_offset = match member_description.offset { | |
1747 | FixedMemberOffset { bytes } => bytes as u64, | |
1748 | ComputedMemberOffset => machine::llelement_offset(cx, composite_llvm_type, i) | |
1749 | }; | |
1a4d82fc | 1750 | |
d9579d0f AL |
1751 | let member_name = member_description.name.as_bytes(); |
1752 | let member_name = CString::new(member_name).unwrap(); | |
1753 | unsafe { | |
5bcae85e | 1754 | llvm::LLVMRustDIBuilderCreateMemberType( |
d9579d0f AL |
1755 | DIB(cx), |
1756 | composite_type_metadata, | |
1757 | member_name.as_ptr(), | |
5bcae85e | 1758 | unknown_file_metadata(cx), |
d9579d0f AL |
1759 | UNKNOWN_LINE_NUMBER, |
1760 | bytes_to_bits(member_size), | |
1761 | bytes_to_bits(member_align), | |
1762 | bytes_to_bits(member_offset), | |
1763 | member_description.flags, | |
1764 | member_description.type_metadata) | |
1a4d82fc | 1765 | } |
d9579d0f AL |
1766 | }) |
1767 | .collect(); | |
1a4d82fc | 1768 | |
d9579d0f AL |
1769 | unsafe { |
1770 | let type_array = create_DIArray(DIB(cx), &member_metadata[..]); | |
5bcae85e SL |
1771 | llvm::LLVMRustDICompositeTypeSetTypeArray( |
1772 | DIB(cx), composite_type_metadata, type_array); | |
d9579d0f AL |
1773 | } |
1774 | } | |
1a4d82fc | 1775 | |
5bcae85e SL |
1776 | // A convenience wrapper around LLVMRustDIBuilderCreateStructType(). Does not do |
1777 | // any caching, does not add any fields to the struct. This can be done later | |
1778 | // with set_members_of_composite_type(). | |
d9579d0f AL |
1779 | fn create_struct_stub(cx: &CrateContext, |
1780 | struct_llvm_type: Type, | |
1781 | struct_type_name: &str, | |
1782 | unique_type_id: UniqueTypeId, | |
1783 | containing_scope: DIScope) | |
1784 | -> DICompositeType { | |
1785 | let (struct_size, struct_align) = size_and_align_of(cx, struct_llvm_type); | |
1a4d82fc | 1786 | |
d9579d0f AL |
1787 | let unique_type_id_str = debug_context(cx).type_map |
1788 | .borrow() | |
1789 | .get_unique_type_id_as_string(unique_type_id); | |
1790 | let name = CString::new(struct_type_name).unwrap(); | |
1791 | let unique_type_id = CString::new(unique_type_id_str.as_bytes()).unwrap(); | |
1792 | let metadata_stub = unsafe { | |
5bcae85e | 1793 | // LLVMRustDIBuilderCreateStructType() wants an empty array. A null |
d9579d0f AL |
1794 | // pointer will lead to hard to trace and debug LLVM assertions |
1795 | // later on in llvm/lib/IR/Value.cpp. | |
1796 | let empty_array = create_DIArray(DIB(cx), &[]); | |
1a4d82fc | 1797 | |
5bcae85e | 1798 | llvm::LLVMRustDIBuilderCreateStructType( |
d9579d0f AL |
1799 | DIB(cx), |
1800 | containing_scope, | |
1801 | name.as_ptr(), | |
5bcae85e | 1802 | unknown_file_metadata(cx), |
d9579d0f AL |
1803 | UNKNOWN_LINE_NUMBER, |
1804 | bytes_to_bits(struct_size), | |
1805 | bytes_to_bits(struct_align), | |
1806 | 0, | |
1807 | ptr::null_mut(), | |
1808 | empty_array, | |
1809 | 0, | |
1810 | ptr::null_mut(), | |
1811 | unique_type_id.as_ptr()) | |
1812 | }; | |
1a4d82fc | 1813 | |
d9579d0f AL |
1814 | return metadata_stub; |
1815 | } | |
1a4d82fc | 1816 | |
d9579d0f AL |
1817 | /// Creates debug information for the given global variable. |
1818 | /// | |
1819 | /// Adds the created metadata nodes directly to the crate's IR. | |
1820 | pub fn create_global_var_metadata(cx: &CrateContext, | |
1821 | node_id: ast::NodeId, | |
1822 | global: ValueRef) { | |
1823 | if cx.dbg_cx().is_none() { | |
1824 | return; | |
1825 | } | |
1a4d82fc | 1826 | |
d9579d0f AL |
1827 | // Don't create debuginfo for globals inlined from other crates. The other |
1828 | // crate should already contain debuginfo for it. More importantly, the | |
1829 | // global might not even exist in un-inlined form anywhere which would lead | |
1830 | // to a linker errors. | |
5bcae85e | 1831 | if cx.tcx().map.is_inlined_node_id(node_id) { |
d9579d0f AL |
1832 | return; |
1833 | } | |
1a4d82fc | 1834 | |
a7813a04 XL |
1835 | let node_def_id = cx.tcx().map.local_def_id(node_id); |
1836 | let (var_scope, span) = get_namespace_and_span_for_item(cx, node_def_id); | |
1a4d82fc | 1837 | |
3157f602 | 1838 | let (file_metadata, line_number) = if span != syntax_pos::DUMMY_SP { |
d9579d0f | 1839 | let loc = span_start(cx, span); |
3157f602 | 1840 | (file_metadata(cx, &loc.file.name, &loc.file.abs_path), loc.line as c_uint) |
d9579d0f | 1841 | } else { |
5bcae85e | 1842 | (unknown_file_metadata(cx), UNKNOWN_LINE_NUMBER) |
d9579d0f | 1843 | }; |
1a4d82fc | 1844 | |
d9579d0f | 1845 | let is_local_to_unit = is_node_local_to_unit(cx, node_id); |
c1a9b12d | 1846 | let variable_type = cx.tcx().node_id_to_type(node_id); |
d9579d0f | 1847 | let type_metadata = type_metadata(cx, variable_type, span); |
a7813a04 XL |
1848 | let var_name = cx.tcx().item_name(node_def_id).to_string(); |
1849 | let linkage_name = mangled_name_of_item(cx, node_def_id, ""); | |
1a4d82fc | 1850 | |
d9579d0f AL |
1851 | let var_name = CString::new(var_name).unwrap(); |
1852 | let linkage_name = CString::new(linkage_name).unwrap(); | |
1853 | unsafe { | |
5bcae85e SL |
1854 | llvm::LLVMRustDIBuilderCreateStaticVariable(DIB(cx), |
1855 | var_scope, | |
1856 | var_name.as_ptr(), | |
1857 | linkage_name.as_ptr(), | |
1858 | file_metadata, | |
1859 | line_number, | |
1860 | type_metadata, | |
1861 | is_local_to_unit, | |
1862 | global, | |
1863 | ptr::null_mut()); | |
d9579d0f AL |
1864 | } |
1865 | } | |
1a4d82fc | 1866 | |
d9579d0f AL |
1867 | /// Creates debug information for the given local variable. |
1868 | /// | |
1869 | /// This function assumes that there's a datum for each pattern component of the | |
1870 | /// local in `bcx.fcx.lllocals`. | |
1871 | /// Adds the created metadata nodes directly to the crate's IR. | |
e9174d1e | 1872 | pub fn create_local_var_metadata(bcx: Block, local: &hir::Local) { |
d9579d0f AL |
1873 | if bcx.unreachable.get() || |
1874 | fn_should_be_ignored(bcx.fcx) || | |
1875 | bcx.sess().opts.debuginfo != FullDebugInfo { | |
1876 | return; | |
1a4d82fc | 1877 | } |
1a4d82fc | 1878 | |
d9579d0f | 1879 | let locals = bcx.fcx.lllocals.borrow(); |
3157f602 | 1880 | pat_util::pat_bindings(&local.pat, |_, node_id, span, var_name| { |
d9579d0f AL |
1881 | let datum = match locals.get(&node_id) { |
1882 | Some(datum) => datum, | |
1883 | None => { | |
54a0048b SL |
1884 | span_bug!(span, |
1885 | "no entry in lllocals table for {}", | |
1886 | node_id); | |
1a4d82fc | 1887 | } |
d9579d0f | 1888 | }; |
1a4d82fc | 1889 | |
d9579d0f | 1890 | if unsafe { llvm::LLVMIsAAllocaInst(datum.val) } == ptr::null_mut() { |
54a0048b SL |
1891 | span_bug!(span, "debuginfo::create_local_var_metadata() - \ |
1892 | Referenced variable location is not an alloca!"); | |
d9579d0f | 1893 | } |
1a4d82fc | 1894 | |
d9579d0f | 1895 | let scope_metadata = scope_metadata(bcx.fcx, node_id, span); |
1a4d82fc | 1896 | |
d9579d0f | 1897 | declare_local(bcx, |
b039eaaf | 1898 | var_name.node, |
d9579d0f AL |
1899 | datum.ty, |
1900 | scope_metadata, | |
1901 | VariableAccess::DirectVariable { alloca: datum.val }, | |
1902 | VariableKind::LocalVariable, | |
1903 | span); | |
1904 | }) | |
1905 | } | |
1a4d82fc | 1906 | |
d9579d0f AL |
1907 | /// Creates debug information for a variable captured in a closure. |
1908 | /// | |
1909 | /// Adds the created metadata nodes directly to the crate's IR. | |
1910 | pub fn create_captured_var_metadata<'blk, 'tcx>(bcx: Block<'blk, 'tcx>, | |
1911 | node_id: ast::NodeId, | |
1912 | env_pointer: ValueRef, | |
1913 | env_index: usize, | |
1914 | captured_by_ref: bool, | |
1915 | span: Span) { | |
1916 | if bcx.unreachable.get() || | |
1917 | fn_should_be_ignored(bcx.fcx) || | |
1918 | bcx.sess().opts.debuginfo != FullDebugInfo { | |
1919 | return; | |
1920 | } | |
1a4d82fc | 1921 | |
d9579d0f | 1922 | let cx = bcx.ccx(); |
1a4d82fc | 1923 | |
d9579d0f | 1924 | let ast_item = cx.tcx().map.find(node_id); |
1a4d82fc | 1925 | |
d9579d0f AL |
1926 | let variable_name = match ast_item { |
1927 | None => { | |
54a0048b | 1928 | span_bug!(span, "debuginfo::create_captured_var_metadata: node not found"); |
d9579d0f | 1929 | } |
b039eaaf | 1930 | Some(hir_map::NodeLocal(pat)) => { |
d9579d0f | 1931 | match pat.node { |
3157f602 | 1932 | PatKind::Binding(_, ref path1, _) => { |
a7813a04 | 1933 | path1.node |
1a4d82fc | 1934 | } |
d9579d0f | 1935 | _ => { |
54a0048b SL |
1936 | span_bug!(span, |
1937 | "debuginfo::create_captured_var_metadata() - \ | |
1938 | Captured var-id refers to unexpected \ | |
1939 | hir_map variant: {:?}", | |
1940 | ast_item); | |
1a4d82fc JJ |
1941 | } |
1942 | } | |
1a4d82fc | 1943 | } |
d9579d0f | 1944 | _ => { |
54a0048b SL |
1945 | span_bug!(span, |
1946 | "debuginfo::create_captured_var_metadata() - \ | |
1947 | Captured var-id refers to unexpected \ | |
1948 | hir_map variant: {:?}", | |
1949 | ast_item); | |
1a4d82fc | 1950 | } |
d9579d0f | 1951 | }; |
1a4d82fc | 1952 | |
d9579d0f | 1953 | let variable_type = common::node_id_type(bcx, node_id); |
54a0048b | 1954 | let scope_metadata = bcx.fcx.debug_context.get_ref(span).fn_metadata; |
1a4d82fc | 1955 | |
d9579d0f AL |
1956 | // env_pointer is the alloca containing the pointer to the environment, |
1957 | // so it's type is **EnvironmentType. In order to find out the type of | |
1958 | // the environment we have to "dereference" two times. | |
1959 | let llvm_env_data_type = common::val_ty(env_pointer).element_type() | |
1960 | .element_type(); | |
1961 | let byte_offset_of_var_in_env = machine::llelement_offset(cx, | |
1962 | llvm_env_data_type, | |
1963 | env_index); | |
1a4d82fc | 1964 | |
d9579d0f | 1965 | let address_operations = unsafe { |
5bcae85e SL |
1966 | [llvm::LLVMRustDIBuilderCreateOpDeref(), |
1967 | llvm::LLVMRustDIBuilderCreateOpPlus(), | |
d9579d0f | 1968 | byte_offset_of_var_in_env as i64, |
5bcae85e | 1969 | llvm::LLVMRustDIBuilderCreateOpDeref()] |
d9579d0f | 1970 | }; |
1a4d82fc | 1971 | |
d9579d0f AL |
1972 | let address_op_count = if captured_by_ref { |
1973 | address_operations.len() | |
1974 | } else { | |
1975 | address_operations.len() - 1 | |
1976 | }; | |
1a4d82fc | 1977 | |
d9579d0f AL |
1978 | let variable_access = VariableAccess::IndirectVariable { |
1979 | alloca: env_pointer, | |
1980 | address_operations: &address_operations[..address_op_count] | |
1981 | }; | |
1a4d82fc | 1982 | |
d9579d0f AL |
1983 | declare_local(bcx, |
1984 | variable_name, | |
1985 | variable_type, | |
1986 | scope_metadata, | |
1987 | variable_access, | |
1988 | VariableKind::CapturedVariable, | |
1989 | span); | |
1a4d82fc JJ |
1990 | } |
1991 | ||
d9579d0f AL |
1992 | /// Creates debug information for a local variable introduced in the head of a |
1993 | /// match-statement arm. | |
1994 | /// | |
1995 | /// Adds the created metadata nodes directly to the crate's IR. | |
1996 | pub fn create_match_binding_metadata<'blk, 'tcx>(bcx: Block<'blk, 'tcx>, | |
1997 | variable_name: ast::Name, | |
1998 | binding: BindingInfo<'tcx>) { | |
1999 | if bcx.unreachable.get() || | |
2000 | fn_should_be_ignored(bcx.fcx) || | |
2001 | bcx.sess().opts.debuginfo != FullDebugInfo { | |
2002 | return; | |
2003 | } | |
1a4d82fc | 2004 | |
d9579d0f AL |
2005 | let scope_metadata = scope_metadata(bcx.fcx, binding.id, binding.span); |
2006 | let aops = unsafe { | |
5bcae85e | 2007 | [llvm::LLVMRustDIBuilderCreateOpDeref()] |
d9579d0f AL |
2008 | }; |
2009 | // Regardless of the actual type (`T`) we're always passed the stack slot | |
2010 | // (alloca) for the binding. For ByRef bindings that's a `T*` but for ByMove | |
2011 | // bindings we actually have `T**`. So to get the actual variable we need to | |
2012 | // dereference once more. For ByCopy we just use the stack slot we created | |
2013 | // for the binding. | |
2014 | let var_access = match binding.trmode { | |
c1a9b12d SL |
2015 | TransBindingMode::TrByCopy(llbinding) | |
2016 | TransBindingMode::TrByMoveIntoCopy(llbinding) => VariableAccess::DirectVariable { | |
d9579d0f AL |
2017 | alloca: llbinding |
2018 | }, | |
c1a9b12d | 2019 | TransBindingMode::TrByMoveRef => VariableAccess::IndirectVariable { |
d9579d0f AL |
2020 | alloca: binding.llmatch, |
2021 | address_operations: &aops | |
2022 | }, | |
c1a9b12d | 2023 | TransBindingMode::TrByRef => VariableAccess::DirectVariable { |
d9579d0f | 2024 | alloca: binding.llmatch |
1a4d82fc | 2025 | } |
d9579d0f | 2026 | }; |
1a4d82fc | 2027 | |
d9579d0f AL |
2028 | declare_local(bcx, |
2029 | variable_name, | |
2030 | binding.ty, | |
2031 | scope_metadata, | |
2032 | var_access, | |
2033 | VariableKind::LocalVariable, | |
2034 | binding.span); | |
1a4d82fc JJ |
2035 | } |
2036 | ||
d9579d0f AL |
2037 | /// Creates debug information for the given function argument. |
2038 | /// | |
2039 | /// This function assumes that there's a datum for each pattern component of the | |
2040 | /// argument in `bcx.fcx.lllocals`. | |
2041 | /// Adds the created metadata nodes directly to the crate's IR. | |
e9174d1e | 2042 | pub fn create_argument_metadata(bcx: Block, arg: &hir::Arg) { |
d9579d0f AL |
2043 | if bcx.unreachable.get() || |
2044 | fn_should_be_ignored(bcx.fcx) || | |
2045 | bcx.sess().opts.debuginfo != FullDebugInfo { | |
2046 | return; | |
2047 | } | |
1a4d82fc | 2048 | |
d9579d0f AL |
2049 | let scope_metadata = bcx |
2050 | .fcx | |
2051 | .debug_context | |
54a0048b | 2052 | .get_ref(arg.pat.span) |
d9579d0f AL |
2053 | .fn_metadata; |
2054 | let locals = bcx.fcx.lllocals.borrow(); | |
1a4d82fc | 2055 | |
3157f602 | 2056 | pat_util::pat_bindings(&arg.pat, |_, node_id, span, var_name| { |
d9579d0f AL |
2057 | let datum = match locals.get(&node_id) { |
2058 | Some(v) => v, | |
1a4d82fc | 2059 | None => { |
54a0048b | 2060 | span_bug!(span, "no entry in lllocals table for {}", node_id); |
1a4d82fc | 2061 | } |
d9579d0f | 2062 | }; |
1a4d82fc | 2063 | |
d9579d0f | 2064 | if unsafe { llvm::LLVMIsAAllocaInst(datum.val) } == ptr::null_mut() { |
54a0048b SL |
2065 | span_bug!(span, "debuginfo::create_argument_metadata() - \ |
2066 | Referenced variable location is not an alloca!"); | |
1a4d82fc | 2067 | } |
1a4d82fc | 2068 | |
d9579d0f AL |
2069 | let argument_index = { |
2070 | let counter = &bcx | |
2071 | .fcx | |
2072 | .debug_context | |
54a0048b | 2073 | .get_ref(span) |
d9579d0f AL |
2074 | .argument_counter; |
2075 | let argument_index = counter.get(); | |
2076 | counter.set(argument_index + 1); | |
2077 | argument_index | |
2078 | }; | |
1a4d82fc | 2079 | |
d9579d0f | 2080 | declare_local(bcx, |
b039eaaf | 2081 | var_name.node, |
d9579d0f AL |
2082 | datum.ty, |
2083 | scope_metadata, | |
2084 | VariableAccess::DirectVariable { alloca: datum.val }, | |
2085 | VariableKind::ArgumentVariable(argument_index), | |
2086 | span); | |
2087 | }) | |
1a4d82fc | 2088 | } |