1 // Copyright 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.
11 use self::RecursiveTypeDescription
::*;
12 use self::MemberOffset
::*;
13 use self::MemberDescriptionFactory
::*;
14 use self::EnumDiscriminantInfo
::*;
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
, is_node_local_to_unit
};
18 use super::namespace
::mangled_name_of_item
;
19 use super::type_names
::compute_debuginfo_type_name
;
20 use super::{CrateDebugContext}
;
21 use context
::SharedCrateContext
;
24 use llvm
::{self, ValueRef}
;
25 use llvm
::debuginfo
::{DIType, DIFile, DIScope, DIDescriptor, DICompositeType, DILexicalBlock}
;
27 use rustc
::hir
::def
::CtorKind
;
28 use rustc
::hir
::def_id
::DefId
;
29 use rustc
::ty
::fold
::TypeVisitor
;
30 use rustc
::ty
::subst
::Substs
;
31 use rustc
::ty
::util
::TypeIdHasher
;
33 use rustc_data_structures
::blake2b
::Blake2bHasher
;
34 use {type_of, machine, monomorphize}
;
35 use common
::CrateContext
;
37 use rustc
::ty
::{self, AdtKind, Ty, layout}
;
39 use util
::nodemap
::FnvHashMap
;
40 use util
::common
::path2cstr
;
42 use libc
::{c_uint, c_longlong}
;
43 use std
::ffi
::CString
;
48 use syntax
::util
::interner
::Interner
;
50 use syntax
::parse
::token
;
51 use syntax_pos
::{self, Span}
;
55 // See http://www.dwarfstd.org/ShowIssue.php?issue=140129.1
56 const DW_LANG_RUST
: c_uint
= 0x1c;
57 #[allow(non_upper_case_globals)]
58 const DW_ATE_boolean
: c_uint
= 0x02;
59 #[allow(non_upper_case_globals)]
60 const DW_ATE_float
: c_uint
= 0x04;
61 #[allow(non_upper_case_globals)]
62 const DW_ATE_signed
: c_uint
= 0x05;
63 #[allow(non_upper_case_globals)]
64 const DW_ATE_unsigned
: c_uint
= 0x07;
65 #[allow(non_upper_case_globals)]
66 const DW_ATE_unsigned_char
: c_uint
= 0x08;
68 pub const UNKNOWN_LINE_NUMBER
: c_uint
= 0;
69 pub const UNKNOWN_COLUMN_NUMBER
: c_uint
= 0;
71 // ptr::null() doesn't work :(
72 pub const NO_SCOPE_METADATA
: DIScope
= (0 as DIScope
);
74 const FLAGS_NONE
: c_uint
= 0;
76 #[derive(Copy, Debug, Hash, Eq, PartialEq, Clone)]
77 pub struct UniqueTypeId(ast
::Name
);
79 // The TypeMap is where the CrateDebugContext holds the type metadata nodes
80 // created so far. The metadata nodes are indexed by UniqueTypeId, and, for
81 // faster lookup, also by Ty. The TypeMap is responsible for creating
83 pub struct TypeMap
<'tcx
> {
84 // The UniqueTypeIds created so far
85 unique_id_interner
: Interner
,
86 // A map from UniqueTypeId to debuginfo metadata for that type. This is a 1:1 mapping.
87 unique_id_to_metadata
: FnvHashMap
<UniqueTypeId
, DIType
>,
88 // A map from types to debuginfo metadata. This is a N:1 mapping.
89 type_to_metadata
: FnvHashMap
<Ty
<'tcx
>, DIType
>,
90 // A map from types to UniqueTypeId. This is a N:1 mapping.
91 type_to_unique_id
: FnvHashMap
<Ty
<'tcx
>, UniqueTypeId
>
94 impl<'tcx
> TypeMap
<'tcx
> {
95 pub fn new() -> TypeMap
<'tcx
> {
97 unique_id_interner
: Interner
::new(),
98 type_to_metadata
: FnvHashMap(),
99 unique_id_to_metadata
: FnvHashMap(),
100 type_to_unique_id
: FnvHashMap(),
104 // Adds a Ty to metadata mapping to the TypeMap. The method will fail if
105 // the mapping already exists.
106 fn register_type_with_metadata
<'a
>(&mut self,
109 if self.type_to_metadata
.insert(type_
, metadata
).is_some() {
110 bug
!("Type metadata for Ty '{}' is already in the TypeMap!", type_
);
114 // Adds a UniqueTypeId to metadata mapping to the TypeMap. The method will
115 // fail if the mapping already exists.
116 fn register_unique_id_with_metadata(&mut self,
117 unique_type_id
: UniqueTypeId
,
119 if self.unique_id_to_metadata
.insert(unique_type_id
, metadata
).is_some() {
120 let unique_type_id_str
= self.get_unique_type_id_as_string(unique_type_id
);
121 bug
!("Type metadata for unique id '{}' is already in the TypeMap!",
122 &unique_type_id_str
[..]);
126 fn find_metadata_for_type(&self, type_
: Ty
<'tcx
>) -> Option
<DIType
> {
127 self.type_to_metadata
.get(&type_
).cloned()
130 fn find_metadata_for_unique_id(&self, unique_type_id
: UniqueTypeId
) -> Option
<DIType
> {
131 self.unique_id_to_metadata
.get(&unique_type_id
).cloned()
134 // Get the string representation of a UniqueTypeId. This method will fail if
135 // the id is unknown.
136 fn get_unique_type_id_as_string(&self, unique_type_id
: UniqueTypeId
) -> Rc
<str> {
137 let UniqueTypeId(interner_key
) = unique_type_id
;
138 self.unique_id_interner
.get(interner_key
)
141 // Get the UniqueTypeId for the given type. If the UniqueTypeId for the given
142 // type has been requested before, this is just a table lookup. Otherwise an
143 // ID will be generated and stored for later lookup.
144 fn get_unique_type_id_of_type
<'a
>(&mut self, cx
: &CrateContext
<'a
, 'tcx
>,
145 type_
: Ty
<'tcx
>) -> UniqueTypeId
{
146 // Let's see if we already have something in the cache
147 match self.type_to_unique_id
.get(&type_
).cloned() {
148 Some(unique_type_id
) => return unique_type_id
,
149 None
=> { /* generate one */}
152 // The hasher we are using to generate the UniqueTypeId. We want
153 // something that provides more than the 64 bits of the DefaultHasher.
154 const TYPE_ID_HASH_LENGTH
: usize = 20;
156 let mut type_id_hasher
= TypeIdHasher
::new(cx
.tcx(),
157 Blake2bHasher
::new(TYPE_ID_HASH_LENGTH
, &[]));
158 type_id_hasher
.visit_ty(type_
);
159 let mut hash_state
= type_id_hasher
.into_inner();
160 let hash
: &[u8] = hash_state
.finalize();
161 debug_assert
!(hash
.len() == TYPE_ID_HASH_LENGTH
);
163 let mut unique_type_id
= String
::with_capacity(TYPE_ID_HASH_LENGTH
* 2);
165 for byte
in hash
.into_iter() {
166 write
!(&mut unique_type_id
, "{:x}", byte
).unwrap();
169 let key
= self.unique_id_interner
.intern(&unique_type_id
);
170 self.type_to_unique_id
.insert(type_
, UniqueTypeId(key
));
172 return UniqueTypeId(key
);
175 // Get the UniqueTypeId for an enum variant. Enum variants are not really
176 // types of their own, so they need special handling. We still need a
177 // UniqueTypeId for them, since to debuginfo they *are* real types.
178 fn get_unique_type_id_of_enum_variant
<'a
>(&mut self,
179 cx
: &CrateContext
<'a
, 'tcx
>,
183 let enum_type_id
= self.get_unique_type_id_of_type(cx
, enum_type
);
184 let enum_variant_type_id
= format
!("{}::{}",
185 &self.get_unique_type_id_as_string(enum_type_id
),
187 let interner_key
= self.unique_id_interner
.intern(&enum_variant_type_id
);
188 UniqueTypeId(interner_key
)
192 // A description of some recursive type. It can either be already finished (as
193 // with FinalMetadata) or it is not yet finished, but contains all information
194 // needed to generate the missing parts of the description. See the
195 // documentation section on Recursive Types at the top of this file for more
197 enum RecursiveTypeDescription
<'tcx
> {
199 unfinished_type
: Ty
<'tcx
>,
200 unique_type_id
: UniqueTypeId
,
201 metadata_stub
: DICompositeType
,
203 member_description_factory
: MemberDescriptionFactory
<'tcx
>,
205 FinalMetadata(DICompositeType
)
208 fn create_and_register_recursive_type_forward_declaration
<'a
, 'tcx
>(
209 cx
: &CrateContext
<'a
, 'tcx
>,
210 unfinished_type
: Ty
<'tcx
>,
211 unique_type_id
: UniqueTypeId
,
212 metadata_stub
: DICompositeType
,
214 member_description_factory
: MemberDescriptionFactory
<'tcx
>)
215 -> RecursiveTypeDescription
<'tcx
> {
217 // Insert the stub into the TypeMap in order to allow for recursive references
218 let mut type_map
= debug_context(cx
).type_map
.borrow_mut();
219 type_map
.register_unique_id_with_metadata(unique_type_id
, metadata_stub
);
220 type_map
.register_type_with_metadata(unfinished_type
, metadata_stub
);
223 unfinished_type
: unfinished_type
,
224 unique_type_id
: unique_type_id
,
225 metadata_stub
: metadata_stub
,
226 llvm_type
: llvm_type
,
227 member_description_factory
: member_description_factory
,
231 impl<'tcx
> RecursiveTypeDescription
<'tcx
> {
232 // Finishes up the description of the type in question (mostly by providing
233 // descriptions of the fields of the given type) and returns the final type
235 fn finalize
<'a
>(&self, cx
: &CrateContext
<'a
, 'tcx
>) -> MetadataCreationResult
{
237 FinalMetadata(metadata
) => MetadataCreationResult
::new(metadata
, false),
243 ref member_description_factory
,
246 // Make sure that we have a forward declaration of the type in
247 // the TypeMap so that recursive references are possible. This
248 // will always be the case if the RecursiveTypeDescription has
249 // been properly created through the
250 // create_and_register_recursive_type_forward_declaration()
253 let type_map
= debug_context(cx
).type_map
.borrow();
254 if type_map
.find_metadata_for_unique_id(unique_type_id
).is_none() ||
255 type_map
.find_metadata_for_type(unfinished_type
).is_none() {
256 bug
!("Forward declaration of potentially recursive type \
257 '{:?}' was not found in TypeMap!",
262 // ... then create the member descriptions ...
263 let member_descriptions
=
264 member_description_factory
.create_member_descriptions(cx
);
266 // ... and attach them to the stub to complete it.
267 set_members_of_composite_type(cx
,
270 &member_descriptions
[..]);
271 return MetadataCreationResult
::new(metadata_stub
, true);
277 // Returns from the enclosing function if the type metadata with the given
278 // unique id can be found in the type map
279 macro_rules
! return_if_metadata_created_in_meantime
{
280 ($cx
: expr
, $unique_type_id
: expr
) => (
281 match debug_context($cx
).type_map
283 .find_metadata_for_unique_id($unique_type_id
) {
284 Some(metadata
) => return MetadataCreationResult
::new(metadata
, true),
285 None
=> { /* proceed normally */ }
290 fn fixed_vec_metadata
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
291 unique_type_id
: UniqueTypeId
,
292 element_type
: Ty
<'tcx
>,
295 -> MetadataCreationResult
{
296 let element_type_metadata
= type_metadata(cx
, element_type
, span
);
298 return_if_metadata_created_in_meantime
!(cx
, unique_type_id
);
300 let element_llvm_type
= type_of
::type_of(cx
, element_type
);
301 let (element_type_size
, element_type_align
) = size_and_align_of(cx
, element_llvm_type
);
303 let (array_size_in_bytes
, upper_bound
) = match len
{
304 Some(len
) => (element_type_size
* len
, len
as c_longlong
),
308 let subrange
= unsafe {
309 llvm
::LLVMRustDIBuilderGetOrCreateSubrange(DIB(cx
), 0, upper_bound
)
312 let subscripts
= create_DIArray(DIB(cx
), &[subrange
]);
313 let metadata
= unsafe {
314 llvm
::LLVMRustDIBuilderCreateArrayType(
316 bytes_to_bits(array_size_in_bytes
),
317 bytes_to_bits(element_type_align
),
318 element_type_metadata
,
322 return MetadataCreationResult
::new(metadata
, false);
325 fn vec_slice_metadata
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
327 element_type
: Ty
<'tcx
>,
328 unique_type_id
: UniqueTypeId
,
330 -> MetadataCreationResult
{
331 let data_ptr_type
= cx
.tcx().mk_ptr(ty
::TypeAndMut
{
333 mutbl
: hir
::MutImmutable
336 let element_type_metadata
= type_metadata(cx
, data_ptr_type
, span
);
338 return_if_metadata_created_in_meantime
!(cx
, unique_type_id
);
340 let slice_llvm_type
= type_of
::type_of(cx
, vec_type
);
341 let slice_type_name
= compute_debuginfo_type_name(cx
, vec_type
, true);
343 let member_llvm_types
= slice_llvm_type
.field_types();
344 assert
!(slice_layout_is_correct(cx
,
345 &member_llvm_types
[..],
347 let member_descriptions
= [
349 name
: "data_ptr".to_string(),
350 llvm_type
: member_llvm_types
[0],
351 type_metadata
: element_type_metadata
,
352 offset
: ComputedMemberOffset
,
356 name
: "length".to_string(),
357 llvm_type
: member_llvm_types
[1],
358 type_metadata
: type_metadata(cx
, cx
.tcx().types
.usize, span
),
359 offset
: ComputedMemberOffset
,
364 assert
!(member_descriptions
.len() == member_llvm_types
.len());
366 let loc
= span_start(cx
, span
);
367 let file_metadata
= file_metadata(cx
, &loc
.file
.name
, &loc
.file
.abs_path
);
369 let metadata
= composite_type_metadata(cx
,
371 &slice_type_name
[..],
373 &member_descriptions
,
377 return MetadataCreationResult
::new(metadata
, false);
379 fn slice_layout_is_correct
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
380 member_llvm_types
: &[Type
],
381 element_type
: Ty
<'tcx
>)
383 member_llvm_types
.len() == 2 &&
384 member_llvm_types
[0] == type_of
::type_of(cx
, element_type
).ptr_to() &&
385 member_llvm_types
[1] == cx
.int_type()
389 fn subroutine_type_metadata
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
390 unique_type_id
: UniqueTypeId
,
391 signature
: &ty
::PolyFnSig
<'tcx
>,
393 -> MetadataCreationResult
395 let signature
= cx
.tcx().erase_late_bound_regions(signature
);
397 let mut signature_metadata
: Vec
<DIType
> = Vec
::with_capacity(signature
.inputs
.len() + 1);
400 signature_metadata
.push(match signature
.output
.sty
{
401 ty
::TyTuple(ref tys
) if tys
.is_empty() => ptr
::null_mut(),
402 _
=> type_metadata(cx
, signature
.output
, span
)
406 for &argument_type
in &signature
.inputs
{
407 signature_metadata
.push(type_metadata(cx
, argument_type
, span
));
410 return_if_metadata_created_in_meantime
!(cx
, unique_type_id
);
412 return MetadataCreationResult
::new(
414 llvm
::LLVMRustDIBuilderCreateSubroutineType(
416 unknown_file_metadata(cx
),
417 create_DIArray(DIB(cx
), &signature_metadata
[..]))
422 // FIXME(1563) This is all a bit of a hack because 'trait pointer' is an ill-
423 // defined concept. For the case of an actual trait pointer (i.e., Box<Trait>,
424 // &Trait), trait_object_type should be the whole thing (e.g, Box<Trait>) and
425 // trait_type should be the actual trait (e.g., Trait). Where the trait is part
426 // of a DST struct, there is no trait_object_type and the results of this
427 // function will be a little bit weird.
428 fn trait_pointer_metadata
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
429 trait_type
: Ty
<'tcx
>,
430 trait_object_type
: Option
<Ty
<'tcx
>>,
431 unique_type_id
: UniqueTypeId
)
433 // The implementation provided here is a stub. It makes sure that the trait
434 // type is assigned the correct name, size, namespace, and source location.
435 // But it does not describe the trait's methods.
437 let def_id
= match trait_type
.sty
{
438 ty
::TyTrait(ref data
) => data
.principal
.def_id(),
440 bug
!("debuginfo: Unexpected trait-object type in \
441 trait_pointer_metadata(): {:?}",
446 let trait_object_type
= trait_object_type
.unwrap_or(trait_type
);
447 let trait_type_name
=
448 compute_debuginfo_type_name(cx
, trait_object_type
, false);
450 let (containing_scope
, _
) = get_namespace_and_span_for_item(cx
, def_id
);
452 let trait_llvm_type
= type_of
::type_of(cx
, trait_object_type
);
453 let file_metadata
= unknown_file_metadata(cx
);
455 composite_type_metadata(cx
,
457 &trait_type_name
[..],
462 syntax_pos
::DUMMY_SP
)
465 pub fn type_metadata
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
467 usage_site_span
: Span
)
469 // Get the unique type id of this type.
470 let unique_type_id
= {
471 let mut type_map
= debug_context(cx
).type_map
.borrow_mut();
472 // First, try to find the type in TypeMap. If we have seen it before, we
473 // can exit early here.
474 match type_map
.find_metadata_for_type(t
) {
479 // The Ty is not in the TypeMap but maybe we have already seen
480 // an equivalent type (e.g. only differing in region arguments).
481 // In order to find out, generate the unique type id and look
483 let unique_type_id
= type_map
.get_unique_type_id_of_type(cx
, t
);
484 match type_map
.find_metadata_for_unique_id(unique_type_id
) {
486 // There is already an equivalent type in the TypeMap.
487 // Register this Ty as an alias in the cache and
488 // return the cached metadata.
489 type_map
.register_type_with_metadata(t
, metadata
);
493 // There really is no type metadata for this type, so
494 // proceed by creating it.
502 debug
!("type_metadata: {:?}", t
);
505 let MetadataCreationResult { metadata, already_stored_in_typemap }
= match *sty
{
512 MetadataCreationResult
::new(basic_type_metadata(cx
, t
), false)
514 ty
::TyTuple(ref elements
) if elements
.is_empty() => {
515 MetadataCreationResult
::new(basic_type_metadata(cx
, t
), false)
517 ty
::TyArray(typ
, len
) => {
518 fixed_vec_metadata(cx
, unique_type_id
, typ
, Some(len
as u64), usage_site_span
)
520 ty
::TySlice(typ
) => {
521 fixed_vec_metadata(cx
, unique_type_id
, typ
, None
, usage_site_span
)
524 fixed_vec_metadata(cx
, unique_type_id
, cx
.tcx().types
.i8, None
, usage_site_span
)
527 MetadataCreationResult
::new(
528 trait_pointer_metadata(cx
, t
, None
, unique_type_id
),
532 ty
::TyRawPtr(ty
::TypeAndMut{ty, ..}
) |
533 ty
::TyRef(_
, ty
::TypeAndMut{ty, ..}
) => {
535 ty
::TySlice(typ
) => {
536 vec_slice_metadata(cx
, t
, typ
, unique_type_id
, usage_site_span
)
539 vec_slice_metadata(cx
, t
, cx
.tcx().types
.u8, unique_type_id
, usage_site_span
)
542 MetadataCreationResult
::new(
543 trait_pointer_metadata(cx
, ty
, Some(t
), unique_type_id
),
547 let pointee_metadata
= type_metadata(cx
, ty
, usage_site_span
);
549 match debug_context(cx
).type_map
551 .find_metadata_for_unique_id(unique_type_id
) {
552 Some(metadata
) => return metadata
,
553 None
=> { /* proceed normally */ }
556 MetadataCreationResult
::new(pointer_type_metadata(cx
, t
, pointee_metadata
),
561 ty
::TyFnDef(.., ref barefnty
) | ty
::TyFnPtr(ref barefnty
) => {
562 let fn_metadata
= subroutine_type_metadata(cx
,
565 usage_site_span
).metadata
;
566 match debug_context(cx
).type_map
568 .find_metadata_for_unique_id(unique_type_id
) {
569 Some(metadata
) => return metadata
,
570 None
=> { /* proceed normally */ }
573 // This is actually a function pointer, so wrap it in pointer DI
574 MetadataCreationResult
::new(pointer_type_metadata(cx
, t
, fn_metadata
), false)
577 ty
::TyClosure(_
, ref substs
) => {
578 prepare_tuple_metadata(cx
,
582 usage_site_span
).finalize(cx
)
584 ty
::TyAdt(def
, ..) => match def
.adt_kind() {
586 prepare_struct_metadata(cx
,
589 usage_site_span
).finalize(cx
)
592 prepare_union_metadata(cx
,
595 usage_site_span
).finalize(cx
)
598 prepare_enum_metadata(cx
,
602 usage_site_span
).finalize(cx
)
605 ty
::TyTuple(ref elements
) => {
606 prepare_tuple_metadata(cx
,
610 usage_site_span
).finalize(cx
)
613 bug
!("debuginfo: unexpected type in type_metadata: {:?}", sty
)
618 let mut type_map
= debug_context(cx
).type_map
.borrow_mut();
620 if already_stored_in_typemap
{
621 // Also make sure that we already have a TypeMap entry for the unique type id.
622 let metadata_for_uid
= match type_map
.find_metadata_for_unique_id(unique_type_id
) {
623 Some(metadata
) => metadata
,
625 let unique_type_id_str
=
626 type_map
.get_unique_type_id_as_string(unique_type_id
);
627 span_bug
!(usage_site_span
,
628 "Expected type metadata for unique \
629 type id '{}' to already be in \
630 the debuginfo::TypeMap but it \
632 &unique_type_id_str
[..],
637 match type_map
.find_metadata_for_type(t
) {
639 if metadata
!= metadata_for_uid
{
640 let unique_type_id_str
=
641 type_map
.get_unique_type_id_as_string(unique_type_id
);
642 span_bug
!(usage_site_span
,
643 "Mismatch between Ty and \
644 UniqueTypeId maps in \
645 debuginfo::TypeMap. \
646 UniqueTypeId={}, Ty={}",
647 &unique_type_id_str
[..],
652 type_map
.register_type_with_metadata(t
, metadata
);
656 type_map
.register_type_with_metadata(t
, metadata
);
657 type_map
.register_unique_id_with_metadata(unique_type_id
, metadata
);
664 pub fn file_metadata(cx
: &CrateContext
, path
: &str, full_path
: &Option
<String
>) -> DIFile
{
665 // FIXME (#9639): This needs to handle non-utf8 paths
666 let work_dir
= cx
.sess().working_dir
.to_str().unwrap();
668 full_path
.as_ref().map(|p
| p
.as_str()).unwrap_or_else(|| {
669 if path
.starts_with(work_dir
) {
670 &path
[work_dir
.len() + 1..path
.len()]
676 file_metadata_(cx
, path
, file_name
, &work_dir
)
679 pub fn unknown_file_metadata(cx
: &CrateContext
) -> DIFile
{
680 // Regular filenames should not be empty, so we abuse an empty name as the
681 // key for the special unknown file metadata
682 file_metadata_(cx
, "", "<unknown>", "")
686 fn file_metadata_(cx
: &CrateContext
, key
: &str, file_name
: &str, work_dir
: &str) -> DIFile
{
687 if let Some(file_metadata
) = debug_context(cx
).created_files
.borrow().get(key
) {
688 return *file_metadata
;
691 debug
!("file_metadata: file_name: {}, work_dir: {}", file_name
, work_dir
);
693 let file_name
= CString
::new(file_name
).unwrap();
694 let work_dir
= CString
::new(work_dir
).unwrap();
695 let file_metadata
= unsafe {
696 llvm
::LLVMRustDIBuilderCreateFile(DIB(cx
), file_name
.as_ptr(),
700 let mut created_files
= debug_context(cx
).created_files
.borrow_mut();
701 created_files
.insert(key
.to_string(), file_metadata
);
705 fn basic_type_metadata
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
706 t
: Ty
<'tcx
>) -> DIType
{
708 debug
!("basic_type_metadata: {:?}", t
);
710 let (name
, encoding
) = match t
.sty
{
711 ty
::TyNever
=> ("!", DW_ATE_unsigned
),
712 ty
::TyTuple(ref elements
) if elements
.is_empty() =>
713 ("()", DW_ATE_unsigned
),
714 ty
::TyBool
=> ("bool", DW_ATE_boolean
),
715 ty
::TyChar
=> ("char", DW_ATE_unsigned_char
),
716 ty
::TyInt(int_ty
) => {
717 (int_ty
.ty_to_string(), DW_ATE_signed
)
719 ty
::TyUint(uint_ty
) => {
720 (uint_ty
.ty_to_string(), DW_ATE_unsigned
)
722 ty
::TyFloat(float_ty
) => {
723 (float_ty
.ty_to_string(), DW_ATE_float
)
725 _
=> bug
!("debuginfo::basic_type_metadata - t is invalid type")
728 let llvm_type
= type_of
::type_of(cx
, t
);
729 let (size
, align
) = size_and_align_of(cx
, llvm_type
);
730 let name
= CString
::new(name
).unwrap();
731 let ty_metadata
= unsafe {
732 llvm
::LLVMRustDIBuilderCreateBasicType(
736 bytes_to_bits(align
),
743 fn pointer_type_metadata
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
744 pointer_type
: Ty
<'tcx
>,
745 pointee_type_metadata
: DIType
)
747 let pointer_llvm_type
= type_of
::type_of(cx
, pointer_type
);
748 let (pointer_size
, pointer_align
) = size_and_align_of(cx
, pointer_llvm_type
);
749 let name
= compute_debuginfo_type_name(cx
, pointer_type
, false);
750 let name
= CString
::new(name
).unwrap();
751 let ptr_metadata
= unsafe {
752 llvm
::LLVMRustDIBuilderCreatePointerType(
754 pointee_type_metadata
,
755 bytes_to_bits(pointer_size
),
756 bytes_to_bits(pointer_align
),
762 pub fn compile_unit_metadata(scc
: &SharedCrateContext
,
763 debug_context
: &CrateDebugContext
,
766 let work_dir
= &sess
.working_dir
;
767 let compile_unit_name
= match sess
.local_crate_source_file
{
768 None
=> fallback_path(scc
),
769 Some(ref abs_path
) => {
770 if abs_path
.is_relative() {
771 sess
.warn("debuginfo: Invalid path to crate's local root source file!");
774 match abs_path
.strip_prefix(work_dir
) {
775 Ok(ref p
) if p
.is_relative() => {
776 if p
.starts_with(Path
::new("./")) {
779 path2cstr(&Path
::new(".").join(p
))
782 _
=> fallback_path(scc
)
788 debug
!("compile_unit_metadata: {:?}", compile_unit_name
);
789 let producer
= format
!("rustc version {}",
790 (option_env
!("CFG_VERSION")).expect("CFG_VERSION"));
792 let compile_unit_name
= compile_unit_name
.as_ptr();
793 let work_dir
= path2cstr(&work_dir
);
794 let producer
= CString
::new(producer
).unwrap();
796 let split_name
= "\0";
798 llvm
::LLVMRustDIBuilderCreateCompileUnit(
799 debug_context
.builder
,
804 sess
.opts
.optimize
!= config
::OptLevel
::No
,
805 flags
.as_ptr() as *const _
,
807 split_name
.as_ptr() as *const _
)
810 fn fallback_path(scc
: &SharedCrateContext
) -> CString
{
811 CString
::new(scc
.link_meta().crate_name
.clone()).unwrap()
815 struct MetadataCreationResult
{
817 already_stored_in_typemap
: bool
820 impl MetadataCreationResult
{
821 fn new(metadata
: DIType
, already_stored_in_typemap
: bool
) -> MetadataCreationResult
{
822 MetadataCreationResult
{
824 already_stored_in_typemap
: already_stored_in_typemap
831 FixedMemberOffset { bytes: usize }
,
832 // For ComputedMemberOffset, the offset is read from the llvm type definition.
836 // Description of a type member, which can either be a regular field (as in
837 // structs or tuples) or an enum variant.
839 struct MemberDescription
{
842 type_metadata
: DIType
,
843 offset
: MemberOffset
,
847 // A factory for MemberDescriptions. It produces a list of member descriptions
848 // for some record-like type. MemberDescriptionFactories are used to defer the
849 // creation of type member descriptions in order to break cycles arising from
850 // recursive type definitions.
851 enum MemberDescriptionFactory
<'tcx
> {
852 StructMDF(StructMemberDescriptionFactory
<'tcx
>),
853 TupleMDF(TupleMemberDescriptionFactory
<'tcx
>),
854 EnumMDF(EnumMemberDescriptionFactory
<'tcx
>),
855 UnionMDF(UnionMemberDescriptionFactory
<'tcx
>),
856 VariantMDF(VariantMemberDescriptionFactory
<'tcx
>)
859 impl<'tcx
> MemberDescriptionFactory
<'tcx
> {
860 fn create_member_descriptions
<'a
>(&self, cx
: &CrateContext
<'a
, 'tcx
>)
861 -> Vec
<MemberDescription
> {
863 StructMDF(ref this
) => {
864 this
.create_member_descriptions(cx
)
866 TupleMDF(ref this
) => {
867 this
.create_member_descriptions(cx
)
869 EnumMDF(ref this
) => {
870 this
.create_member_descriptions(cx
)
872 UnionMDF(ref this
) => {
873 this
.create_member_descriptions(cx
)
875 VariantMDF(ref this
) => {
876 this
.create_member_descriptions(cx
)
882 //=-----------------------------------------------------------------------------
884 //=-----------------------------------------------------------------------------
886 // Creates MemberDescriptions for the fields of a struct
887 struct StructMemberDescriptionFactory
<'tcx
> {
888 variant
: ty
::VariantDef
<'tcx
>,
889 substs
: &'tcx Substs
<'tcx
>,
894 impl<'tcx
> StructMemberDescriptionFactory
<'tcx
> {
895 fn create_member_descriptions
<'a
>(&self, cx
: &CrateContext
<'a
, 'tcx
>)
896 -> Vec
<MemberDescription
> {
897 let field_size
= if self.is_simd
{
898 let fty
= monomorphize
::field_ty(cx
.tcx(),
900 &self.variant
.fields
[0]);
901 Some(machine
::llsize_of_alloc(
903 type_of
::type_of(cx
, fty
)
909 self.variant
.fields
.iter().enumerate().map(|(i
, f
)| {
910 let name
= if self.variant
.ctor_kind
== CtorKind
::Fn
{
915 let fty
= monomorphize
::field_ty(cx
.tcx(), self.substs
, f
);
917 let offset
= if self.is_simd
{
918 FixedMemberOffset { bytes: i * field_size.unwrap() }
925 llvm_type
: type_of
::type_of(cx
, fty
),
926 type_metadata
: type_metadata(cx
, fty
, self.span
),
935 fn prepare_struct_metadata
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
936 struct_type
: Ty
<'tcx
>,
937 unique_type_id
: UniqueTypeId
,
939 -> RecursiveTypeDescription
<'tcx
> {
940 let struct_name
= compute_debuginfo_type_name(cx
, struct_type
, false);
941 let struct_llvm_type
= type_of
::in_memory_type_of(cx
, struct_type
);
943 let (struct_def_id
, variant
, substs
) = match struct_type
.sty
{
944 ty
::TyAdt(def
, substs
) => (def
.did
, def
.struct_variant(), substs
),
945 _
=> bug
!("prepare_struct_metadata on a non-ADT")
948 let (containing_scope
, _
) = get_namespace_and_span_for_item(cx
, struct_def_id
);
950 let struct_metadata_stub
= create_struct_stub(cx
,
956 create_and_register_recursive_type_forward_declaration(
960 struct_metadata_stub
,
962 StructMDF(StructMemberDescriptionFactory
{
965 is_simd
: struct_type
.is_simd(),
971 //=-----------------------------------------------------------------------------
973 //=-----------------------------------------------------------------------------
975 // Creates MemberDescriptions for the fields of a tuple
976 struct TupleMemberDescriptionFactory
<'tcx
> {
977 component_types
: Vec
<Ty
<'tcx
>>,
981 impl<'tcx
> TupleMemberDescriptionFactory
<'tcx
> {
982 fn create_member_descriptions
<'a
>(&self, cx
: &CrateContext
<'a
, 'tcx
>)
983 -> Vec
<MemberDescription
> {
987 .map(|(i
, &component_type
)| {
989 name
: format
!("__{}", i
),
990 llvm_type
: type_of
::type_of(cx
, component_type
),
991 type_metadata
: type_metadata(cx
, component_type
, self.span
),
992 offset
: ComputedMemberOffset
,
999 fn prepare_tuple_metadata
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
1000 tuple_type
: Ty
<'tcx
>,
1001 component_types
: &[Ty
<'tcx
>],
1002 unique_type_id
: UniqueTypeId
,
1004 -> RecursiveTypeDescription
<'tcx
> {
1005 let tuple_name
= compute_debuginfo_type_name(cx
, tuple_type
, false);
1006 let tuple_llvm_type
= type_of
::type_of(cx
, tuple_type
);
1008 create_and_register_recursive_type_forward_declaration(
1012 create_struct_stub(cx
,
1018 TupleMDF(TupleMemberDescriptionFactory
{
1019 component_types
: component_types
.to_vec(),
1025 //=-----------------------------------------------------------------------------
1027 //=-----------------------------------------------------------------------------
1029 struct UnionMemberDescriptionFactory
<'tcx
> {
1030 variant
: ty
::VariantDef
<'tcx
>,
1031 substs
: &'tcx Substs
<'tcx
>,
1035 impl<'tcx
> UnionMemberDescriptionFactory
<'tcx
> {
1036 fn create_member_descriptions
<'a
>(&self, cx
: &CrateContext
<'a
, 'tcx
>)
1037 -> Vec
<MemberDescription
> {
1038 self.variant
.fields
.iter().map(|field
| {
1039 let fty
= monomorphize
::field_ty(cx
.tcx(), self.substs
, field
);
1041 name
: field
.name
.to_string(),
1042 llvm_type
: type_of
::type_of(cx
, fty
),
1043 type_metadata
: type_metadata(cx
, fty
, self.span
),
1044 offset
: FixedMemberOffset { bytes: 0 }
,
1051 fn prepare_union_metadata
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
1052 union_type
: Ty
<'tcx
>,
1053 unique_type_id
: UniqueTypeId
,
1055 -> RecursiveTypeDescription
<'tcx
> {
1056 let union_name
= compute_debuginfo_type_name(cx
, union_type
, false);
1057 let union_llvm_type
= type_of
::in_memory_type_of(cx
, union_type
);
1059 let (union_def_id
, variant
, substs
) = match union_type
.sty
{
1060 ty
::TyAdt(def
, substs
) => (def
.did
, def
.struct_variant(), substs
),
1061 _
=> bug
!("prepare_union_metadata on a non-ADT")
1064 let (containing_scope
, _
) = get_namespace_and_span_for_item(cx
, union_def_id
);
1066 let union_metadata_stub
= create_union_stub(cx
,
1072 create_and_register_recursive_type_forward_declaration(
1076 union_metadata_stub
,
1078 UnionMDF(UnionMemberDescriptionFactory
{
1086 //=-----------------------------------------------------------------------------
1088 //=-----------------------------------------------------------------------------
1090 // Describes the members of an enum value: An enum is described as a union of
1091 // structs in DWARF. This MemberDescriptionFactory provides the description for
1092 // the members of this union; so for every variant of the given enum, this
1093 // factory will produce one MemberDescription (all with no name and a fixed
1094 // offset of zero bytes).
1095 struct EnumMemberDescriptionFactory
<'tcx
> {
1096 enum_type
: Ty
<'tcx
>,
1097 type_rep
: &'tcx layout
::Layout
,
1098 discriminant_type_metadata
: Option
<DIType
>,
1099 containing_scope
: DIScope
,
1100 file_metadata
: DIFile
,
1104 impl<'tcx
> EnumMemberDescriptionFactory
<'tcx
> {
1105 fn create_member_descriptions
<'a
>(&self, cx
: &CrateContext
<'a
, 'tcx
>)
1106 -> Vec
<MemberDescription
> {
1107 let adt
= &self.enum_type
.ty_adt_def().unwrap();
1108 let substs
= match self.enum_type
.sty
{
1109 ty
::TyAdt(def
, ref s
) if def
.adt_kind() == AdtKind
::Enum
=> s
,
1110 _
=> bug
!("{} is not an enum", self.enum_type
)
1112 match *self.type_rep
{
1113 layout
::General { ref variants, .. }
=> {
1114 let discriminant_info
= RegularDiscriminant(self.discriminant_type_metadata
1119 .map(|(i
, struct_def
)| {
1120 let (variant_type_metadata
,
1122 member_desc_factory
) =
1123 describe_enum_variant(cx
,
1128 self.containing_scope
,
1131 let member_descriptions
= member_desc_factory
1132 .create_member_descriptions(cx
);
1134 set_members_of_composite_type(cx
,
1135 variant_type_metadata
,
1137 &member_descriptions
);
1139 name
: "".to_string(),
1140 llvm_type
: variant_llvm_type
,
1141 type_metadata
: variant_type_metadata
,
1142 offset
: FixedMemberOffset { bytes: 0 }
,
1147 layout
::Univariant{ ref variant, .. }
=> {
1148 assert
!(adt
.variants
.len() <= 1);
1150 if adt
.variants
.is_empty() {
1153 let (variant_type_metadata
,
1155 member_description_factory
) =
1156 describe_enum_variant(cx
,
1161 self.containing_scope
,
1164 let member_descriptions
=
1165 member_description_factory
.create_member_descriptions(cx
);
1167 set_members_of_composite_type(cx
,
1168 variant_type_metadata
,
1170 &member_descriptions
[..]);
1173 name
: "".to_string(),
1174 llvm_type
: variant_llvm_type
,
1175 type_metadata
: variant_type_metadata
,
1176 offset
: FixedMemberOffset { bytes: 0 }
,
1182 layout
::RawNullablePointer { nndiscr: non_null_variant_index, .. }
=> {
1183 // As far as debuginfo is concerned, the pointer this enum
1184 // represents is still wrapped in a struct. This is to make the
1185 // DWARF representation of enums uniform.
1187 // First create a description of the artificial wrapper struct:
1188 let non_null_variant
= &adt
.variants
[non_null_variant_index
as usize];
1189 let non_null_variant_name
= non_null_variant
.name
.as_str();
1191 // The llvm type and metadata of the pointer
1192 let nnty
= monomorphize
::field_ty(cx
.tcx(), &substs
, &non_null_variant
.fields
[0] );
1193 let non_null_llvm_type
= type_of
::type_of(cx
, nnty
);
1194 let non_null_type_metadata
= type_metadata(cx
, nnty
, self.span
);
1196 // The type of the artificial struct wrapping the pointer
1197 let artificial_struct_llvm_type
= Type
::struct_(cx
,
1198 &[non_null_llvm_type
],
1201 // For the metadata of the wrapper struct, we need to create a
1202 // MemberDescription of the struct's single field.
1203 let sole_struct_member_description
= MemberDescription
{
1204 name
: match non_null_variant
.ctor_kind
{
1205 CtorKind
::Fn
=> "__0".to_string(),
1206 CtorKind
::Fictive
=> {
1207 non_null_variant
.fields
[0].name
.to_string()
1209 CtorKind
::Const
=> bug
!()
1211 llvm_type
: non_null_llvm_type
,
1212 type_metadata
: non_null_type_metadata
,
1213 offset
: FixedMemberOffset { bytes: 0 }
,
1217 let unique_type_id
= debug_context(cx
).type_map
1219 .get_unique_type_id_of_enum_variant(
1222 &non_null_variant_name
);
1224 // Now we can create the metadata of the artificial struct
1225 let artificial_struct_metadata
=
1226 composite_type_metadata(cx
,
1227 artificial_struct_llvm_type
,
1228 &non_null_variant_name
,
1230 &[sole_struct_member_description
],
1231 self.containing_scope
,
1233 syntax_pos
::DUMMY_SP
);
1235 // Encode the information about the null variant in the union
1237 let null_variant_index
= (1 - non_null_variant_index
) as usize;
1238 let null_variant_name
= adt
.variants
[null_variant_index
].name
;
1239 let union_member_name
= format
!("RUST$ENCODED$ENUM${}${}",
1243 // Finally create the (singleton) list of descriptions of union
1247 name
: union_member_name
,
1248 llvm_type
: artificial_struct_llvm_type
,
1249 type_metadata
: artificial_struct_metadata
,
1250 offset
: FixedMemberOffset { bytes: 0 }
,
1255 layout
::StructWrappedNullablePointer
{ nonnull
: ref struct_def
,
1257 ref discrfield
, ..} => {
1258 // Create a description of the non-null variant
1259 let (variant_type_metadata
, variant_llvm_type
, member_description_factory
) =
1260 describe_enum_variant(cx
,
1263 &adt
.variants
[nndiscr
as usize],
1264 OptimizedDiscriminant
,
1265 self.containing_scope
,
1268 let variant_member_descriptions
=
1269 member_description_factory
.create_member_descriptions(cx
);
1271 set_members_of_composite_type(cx
,
1272 variant_type_metadata
,
1274 &variant_member_descriptions
[..]);
1276 // Encode the information about the null variant in the union
1278 let null_variant_index
= (1 - nndiscr
) as usize;
1279 let null_variant_name
= adt
.variants
[null_variant_index
].name
;
1280 let discrfield
= discrfield
.iter()
1282 .map(|x
| x
.to_string())
1283 .collect
::<Vec
<_
>>().join("$");
1284 let union_member_name
= format
!("RUST$ENCODED$ENUM${}${}",
1288 // Create the (singleton) list of descriptions of union members.
1291 name
: union_member_name
,
1292 llvm_type
: variant_llvm_type
,
1293 type_metadata
: variant_type_metadata
,
1294 offset
: FixedMemberOffset { bytes: 0 }
,
1299 layout
::CEnum { .. }
=> span_bug
!(self.span
, "This should be unreachable."),
1300 ref l @ _
=> bug
!("Not an enum layout: {:#?}", l
)
1305 // Creates MemberDescriptions for the fields of a single enum variant.
1306 struct VariantMemberDescriptionFactory
<'tcx
> {
1307 args
: Vec
<(String
, Ty
<'tcx
>)>,
1308 discriminant_type_metadata
: Option
<DIType
>,
1312 impl<'tcx
> VariantMemberDescriptionFactory
<'tcx
> {
1313 fn create_member_descriptions
<'a
>(&self, cx
: &CrateContext
<'a
, 'tcx
>)
1314 -> Vec
<MemberDescription
> {
1315 self.args
.iter().enumerate().map(|(i
, &(ref name
, ty
))| {
1317 name
: name
.to_string(),
1318 llvm_type
: type_of
::type_of(cx
, ty
),
1319 type_metadata
: match self.discriminant_type_metadata
{
1320 Some(metadata
) if i
== 0 => metadata
,
1321 _
=> type_metadata(cx
, ty
, self.span
)
1323 offset
: ComputedMemberOffset
,
1330 #[derive(Copy, Clone)]
1331 enum EnumDiscriminantInfo
{
1332 RegularDiscriminant(DIType
),
1333 OptimizedDiscriminant
,
1337 // Returns a tuple of (1) type_metadata_stub of the variant, (2) the llvm_type
1338 // of the variant, and (3) a MemberDescriptionFactory for producing the
1339 // descriptions of the fields of the variant. This is a rudimentary version of a
1340 // full RecursiveTypeDescription.
1341 fn describe_enum_variant
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
1342 enum_type
: Ty
<'tcx
>,
1343 struct_def
: &layout
::Struct
,
1344 variant
: ty
::VariantDef
<'tcx
>,
1345 discriminant_info
: EnumDiscriminantInfo
,
1346 containing_scope
: DIScope
,
1348 -> (DICompositeType
, Type
, MemberDescriptionFactory
<'tcx
>) {
1349 let substs
= match enum_type
.sty
{
1350 ty
::TyAdt(def
, s
) if def
.adt_kind() == AdtKind
::Enum
=> s
,
1351 ref t @ _
=> bug
!("{:#?} is not an enum", t
)
1354 let maybe_discr_and_signed
: Option
<(layout
::Integer
, bool
)> = match *cx
.layout_of(enum_type
) {
1355 layout
::CEnum {discr, ..}
=> Some((discr
, true)),
1356 layout
::General{discr, ..}
=> Some((discr
, false)),
1357 layout
::Univariant { .. }
1358 | layout
::RawNullablePointer { .. }
1359 | layout
::StructWrappedNullablePointer { .. }
=> None
,
1360 ref l @ _
=> bug
!("This should be unreachable. Type is {:#?} layout is {:#?}", enum_type
, l
)
1363 let mut field_tys
= variant
.fields
.iter().map(|f
: ty
::FieldDef
<'tcx
>| {
1364 monomorphize
::field_ty(cx
.tcx(), &substs
, f
)
1365 }).collect
::<Vec
<_
>>();
1367 if let Some((discr
, signed
)) = maybe_discr_and_signed
{
1368 field_tys
.insert(0, discr
.to_ty(&cx
.tcx(), signed
));
1372 let variant_llvm_type
=
1373 Type
::struct_(cx
, &field_tys
1375 .map(|t
| type_of
::type_of(cx
, t
))
1376 .collect
::<Vec
<_
>>()
1379 // Could do some consistency checks here: size, align, field count, discr type
1381 let variant_name
= variant
.name
.as_str();
1382 let unique_type_id
= debug_context(cx
).type_map
1384 .get_unique_type_id_of_enum_variant(
1389 let metadata_stub
= create_struct_stub(cx
,
1395 // Get the argument names from the enum variant info
1396 let mut arg_names
: Vec
<_
> = match variant
.ctor_kind
{
1397 CtorKind
::Const
=> vec
![],
1402 .map(|(i
, _
)| format
!("__{}", i
))
1405 CtorKind
::Fictive
=> {
1408 .map(|f
| f
.name
.to_string())
1413 // If this is not a univariant enum, there is also the discriminant field.
1414 match discriminant_info
{
1415 RegularDiscriminant(_
) => arg_names
.insert(0, "RUST$ENUM$DISR".to_string()),
1416 _
=> { /* do nothing */ }
1419 // Build an array of (field name, field type) pairs to be captured in the factory closure.
1420 let args
: Vec
<(String
, Ty
)> = arg_names
.iter()
1421 .zip(field_tys
.iter())
1422 .map(|(s
, &t
)| (s
.to_string(), t
))
1425 let member_description_factory
=
1426 VariantMDF(VariantMemberDescriptionFactory
{
1428 discriminant_type_metadata
: match discriminant_info
{
1429 RegularDiscriminant(discriminant_type_metadata
) => {
1430 Some(discriminant_type_metadata
)
1437 (metadata_stub
, variant_llvm_type
, member_description_factory
)
1440 fn prepare_enum_metadata
<'a
, 'tcx
>(cx
: &CrateContext
<'a
, 'tcx
>,
1441 enum_type
: Ty
<'tcx
>,
1443 unique_type_id
: UniqueTypeId
,
1445 -> RecursiveTypeDescription
<'tcx
> {
1446 let enum_name
= compute_debuginfo_type_name(cx
, enum_type
, false);
1448 let (containing_scope
, _
) = get_namespace_and_span_for_item(cx
, enum_def_id
);
1449 // FIXME: This should emit actual file metadata for the enum, but we
1450 // currently can't get the necessary information when it comes to types
1451 // imported from other crates. Formerly we violated the ODR when performing
1452 // LTO because we emitted debuginfo for the same type with varying file
1453 // metadata, so as a workaround we pretend that the type comes from
1455 let file_metadata
= unknown_file_metadata(cx
);
1457 let variants
= &enum_type
.ty_adt_def().unwrap().variants
;
1458 let enumerators_metadata
: Vec
<DIDescriptor
> = variants
1461 let token
= v
.name
.as_str();
1462 let name
= CString
::new(token
.as_bytes()).unwrap();
1464 llvm
::LLVMRustDIBuilderCreateEnumerator(
1467 v
.disr_val
.to_u64_unchecked())
1472 let discriminant_type_metadata
= |inttype
: layout
::Integer
, signed
: bool
| {
1473 let disr_type_key
= (enum_def_id
, inttype
);
1474 let cached_discriminant_type_metadata
= debug_context(cx
).created_enum_disr_types
1476 .get(&disr_type_key
).cloned();
1477 match cached_discriminant_type_metadata
{
1478 Some(discriminant_type_metadata
) => discriminant_type_metadata
,
1480 let discriminant_llvm_type
= Type
::from_integer(cx
, inttype
);
1481 let (discriminant_size
, discriminant_align
) =
1482 size_and_align_of(cx
, discriminant_llvm_type
);
1483 let discriminant_base_type_metadata
=
1485 inttype
.to_ty(&cx
.tcx(), signed
),
1486 syntax_pos
::DUMMY_SP
);
1487 let discriminant_name
= get_enum_discriminant_name(cx
, enum_def_id
);
1489 let name
= CString
::new(discriminant_name
.as_bytes()).unwrap();
1490 let discriminant_type_metadata
= unsafe {
1491 llvm
::LLVMRustDIBuilderCreateEnumerationType(
1496 UNKNOWN_LINE_NUMBER
,
1497 bytes_to_bits(discriminant_size
),
1498 bytes_to_bits(discriminant_align
),
1499 create_DIArray(DIB(cx
), &enumerators_metadata
),
1500 discriminant_base_type_metadata
)
1503 debug_context(cx
).created_enum_disr_types
1505 .insert(disr_type_key
, discriminant_type_metadata
);
1507 discriminant_type_metadata
1512 let type_rep
= cx
.layout_of(enum_type
);
1514 let discriminant_type_metadata
= match *type_rep
{
1515 layout
::CEnum { discr, signed, .. }
=> {
1516 return FinalMetadata(discriminant_type_metadata(discr
, signed
))
1518 layout
::RawNullablePointer { .. }
|
1519 layout
::StructWrappedNullablePointer { .. }
|
1520 layout
::Univariant { .. }
=> None
,
1521 layout
::General { discr, .. }
=> Some(discriminant_type_metadata(discr
, false)),
1522 ref l @ _
=> bug
!("Not an enum layout: {:#?}", l
)
1525 let enum_llvm_type
= type_of
::type_of(cx
, enum_type
);
1526 let (enum_type_size
, enum_type_align
) = size_and_align_of(cx
, enum_llvm_type
);
1528 let unique_type_id_str
= debug_context(cx
)
1531 .get_unique_type_id_as_string(unique_type_id
);
1533 let enum_name
= CString
::new(enum_name
).unwrap();
1534 let unique_type_id_str
= CString
::new(unique_type_id_str
.as_bytes()).unwrap();
1535 let enum_metadata
= unsafe {
1536 llvm
::LLVMRustDIBuilderCreateUnionType(
1541 UNKNOWN_LINE_NUMBER
,
1542 bytes_to_bits(enum_type_size
),
1543 bytes_to_bits(enum_type_align
),
1547 unique_type_id_str
.as_ptr())
1550 return create_and_register_recursive_type_forward_declaration(
1556 EnumMDF(EnumMemberDescriptionFactory
{
1557 enum_type
: enum_type
,
1559 discriminant_type_metadata
: discriminant_type_metadata
,
1560 containing_scope
: containing_scope
,
1561 file_metadata
: file_metadata
,
1566 fn get_enum_discriminant_name(cx
: &CrateContext
,
1568 -> token
::InternedString
{
1569 cx
.tcx().item_name(def_id
).as_str()
1573 /// Creates debug information for a composite type, that is, anything that
1574 /// results in a LLVM struct.
1576 /// Examples of Rust types to use this are: structs, tuples, boxes, vecs, and enums.
1577 fn composite_type_metadata(cx
: &CrateContext
,
1578 composite_llvm_type
: Type
,
1579 composite_type_name
: &str,
1580 composite_type_unique_id
: UniqueTypeId
,
1581 member_descriptions
: &[MemberDescription
],
1582 containing_scope
: DIScope
,
1584 // Ignore source location information as long as it
1585 // can't be reconstructed for non-local crates.
1586 _file_metadata
: DIFile
,
1587 _definition_span
: Span
)
1588 -> DICompositeType
{
1589 // Create the (empty) struct metadata node ...
1590 let composite_type_metadata
= create_struct_stub(cx
,
1591 composite_llvm_type
,
1592 composite_type_name
,
1593 composite_type_unique_id
,
1595 // ... and immediately create and add the member descriptions.
1596 set_members_of_composite_type(cx
,
1597 composite_type_metadata
,
1598 composite_llvm_type
,
1599 member_descriptions
);
1601 return composite_type_metadata
;
1604 fn set_members_of_composite_type(cx
: &CrateContext
,
1605 composite_type_metadata
: DICompositeType
,
1606 composite_llvm_type
: Type
,
1607 member_descriptions
: &[MemberDescription
]) {
1608 // In some rare cases LLVM metadata uniquing would lead to an existing type
1609 // description being used instead of a new one created in
1610 // create_struct_stub. This would cause a hard to trace assertion in
1611 // DICompositeType::SetTypeArray(). The following check makes sure that we
1612 // get a better error message if this should happen again due to some
1615 let mut composite_types_completed
=
1616 debug_context(cx
).composite_types_completed
.borrow_mut();
1617 if composite_types_completed
.contains(&composite_type_metadata
) {
1618 bug
!("debuginfo::set_members_of_composite_type() - \
1619 Already completed forward declaration re-encountered.");
1621 composite_types_completed
.insert(composite_type_metadata
);
1625 let member_metadata
: Vec
<DIDescriptor
> = member_descriptions
1628 .map(|(i
, member_description
)| {
1629 let (member_size
, member_align
) = size_and_align_of(cx
, member_description
.llvm_type
);
1630 let member_offset
= match member_description
.offset
{
1631 FixedMemberOffset { bytes }
=> bytes
as u64,
1632 ComputedMemberOffset
=> machine
::llelement_offset(cx
, composite_llvm_type
, i
)
1635 let member_name
= member_description
.name
.as_bytes();
1636 let member_name
= CString
::new(member_name
).unwrap();
1638 llvm
::LLVMRustDIBuilderCreateMemberType(
1640 composite_type_metadata
,
1641 member_name
.as_ptr(),
1642 unknown_file_metadata(cx
),
1643 UNKNOWN_LINE_NUMBER
,
1644 bytes_to_bits(member_size
),
1645 bytes_to_bits(member_align
),
1646 bytes_to_bits(member_offset
),
1647 member_description
.flags
,
1648 member_description
.type_metadata
)
1654 let type_array
= create_DIArray(DIB(cx
), &member_metadata
[..]);
1655 llvm
::LLVMRustDICompositeTypeSetTypeArray(
1656 DIB(cx
), composite_type_metadata
, type_array
);
1660 // A convenience wrapper around LLVMRustDIBuilderCreateStructType(). Does not do
1661 // any caching, does not add any fields to the struct. This can be done later
1662 // with set_members_of_composite_type().
1663 fn create_struct_stub(cx
: &CrateContext
,
1664 struct_llvm_type
: Type
,
1665 struct_type_name
: &str,
1666 unique_type_id
: UniqueTypeId
,
1667 containing_scope
: DIScope
)
1668 -> DICompositeType
{
1669 let (struct_size
, struct_align
) = size_and_align_of(cx
, struct_llvm_type
);
1671 let unique_type_id_str
= debug_context(cx
).type_map
1673 .get_unique_type_id_as_string(unique_type_id
);
1674 let name
= CString
::new(struct_type_name
).unwrap();
1675 let unique_type_id
= CString
::new(unique_type_id_str
.as_bytes()).unwrap();
1676 let metadata_stub
= unsafe {
1677 // LLVMRustDIBuilderCreateStructType() wants an empty array. A null
1678 // pointer will lead to hard to trace and debug LLVM assertions
1679 // later on in llvm/lib/IR/Value.cpp.
1680 let empty_array
= create_DIArray(DIB(cx
), &[]);
1682 llvm
::LLVMRustDIBuilderCreateStructType(
1686 unknown_file_metadata(cx
),
1687 UNKNOWN_LINE_NUMBER
,
1688 bytes_to_bits(struct_size
),
1689 bytes_to_bits(struct_align
),
1695 unique_type_id
.as_ptr())
1698 return metadata_stub
;
1701 fn create_union_stub(cx
: &CrateContext
,
1702 union_llvm_type
: Type
,
1703 union_type_name
: &str,
1704 unique_type_id
: UniqueTypeId
,
1705 containing_scope
: DIScope
)
1706 -> DICompositeType
{
1707 let (union_size
, union_align
) = size_and_align_of(cx
, union_llvm_type
);
1709 let unique_type_id_str
= debug_context(cx
).type_map
1711 .get_unique_type_id_as_string(unique_type_id
);
1712 let name
= CString
::new(union_type_name
).unwrap();
1713 let unique_type_id
= CString
::new(unique_type_id_str
.as_bytes()).unwrap();
1714 let metadata_stub
= unsafe {
1715 // LLVMRustDIBuilderCreateUnionType() wants an empty array. A null
1716 // pointer will lead to hard to trace and debug LLVM assertions
1717 // later on in llvm/lib/IR/Value.cpp.
1718 let empty_array
= create_DIArray(DIB(cx
), &[]);
1720 llvm
::LLVMRustDIBuilderCreateUnionType(
1724 unknown_file_metadata(cx
),
1725 UNKNOWN_LINE_NUMBER
,
1726 bytes_to_bits(union_size
),
1727 bytes_to_bits(union_align
),
1731 unique_type_id
.as_ptr())
1734 return metadata_stub
;
1737 /// Creates debug information for the given global variable.
1739 /// Adds the created metadata nodes directly to the crate's IR.
1740 pub fn create_global_var_metadata(cx
: &CrateContext
,
1741 node_id
: ast
::NodeId
,
1743 if cx
.dbg_cx().is_none() {
1749 // Don't create debuginfo for globals inlined from other crates. The other
1750 // crate should already contain debuginfo for it. More importantly, the
1751 // global might not even exist in un-inlined form anywhere which would lead
1752 // to a linker errors.
1753 if tcx
.map
.is_inlined_node_id(node_id
) {
1757 let node_def_id
= tcx
.map
.local_def_id(node_id
);
1758 let (var_scope
, span
) = get_namespace_and_span_for_item(cx
, node_def_id
);
1760 let (file_metadata
, line_number
) = if span
!= syntax_pos
::DUMMY_SP
{
1761 let loc
= span_start(cx
, span
);
1762 (file_metadata(cx
, &loc
.file
.name
, &loc
.file
.abs_path
), loc
.line
as c_uint
)
1764 (unknown_file_metadata(cx
), UNKNOWN_LINE_NUMBER
)
1767 let is_local_to_unit
= is_node_local_to_unit(cx
, node_id
);
1768 let variable_type
= tcx
.erase_regions(&tcx
.tables().node_id_to_type(node_id
));
1769 let type_metadata
= type_metadata(cx
, variable_type
, span
);
1770 let var_name
= tcx
.item_name(node_def_id
).to_string();
1771 let linkage_name
= mangled_name_of_item(cx
, node_def_id
, "");
1773 let var_name
= CString
::new(var_name
).unwrap();
1774 let linkage_name
= CString
::new(linkage_name
).unwrap();
1776 llvm
::LLVMRustDIBuilderCreateStaticVariable(DIB(cx
),
1779 linkage_name
.as_ptr(),
1789 // Creates an "extension" of an existing DIScope into another file.
1790 pub fn extend_scope_to_file(ccx
: &CrateContext
,
1791 scope_metadata
: DIScope
,
1792 file
: &syntax_pos
::FileMap
)
1794 let file_metadata
= file_metadata(ccx
, &file
.name
, &file
.abs_path
);
1796 llvm
::LLVMRustDIBuilderCreateLexicalBlockFile(